feat: add support of linea and base networks (#795)

<!-- This is an auto-generated description by cubic. -->

## Summary by cubic
Added support docs and release notes for Linea (zkEVM) and Base (OP
Stack) in the Network Manager to enable fast L2 deployments. Removes
Sonic from L1 supported networks. Addresses Linear ENG-4106.

- **New Features**
- Added Linea and Base to the Network Manager supported L2 list with
feature and use case guidance.
- New docs: linea.mdx and base.mdx (mainnet and Sepolia, tooling,
operations).
- Updated menus: L2 meta.json includes Linea and Base; L1 meta.json
removes Sonic.
  - Intro page now highlights Linea and Base benefits.
  - Added logos and release note: “Support the Linea and Base Networks.”

- **Migration**
  - No breaking changes. Update any internal links referencing Sonic.
- Use Network Manager wizards to configure RPC, gas, and deployment
pipelines for Linea and Base.

<!-- End of auto-generated description by cubic. -->

Author: insider89

content/docs/about-settlemint/introduction.mdx

@@ -140,13 +140,6 @@ SettleMint's ecosystem provides **everything needed to build, deploy, and scale
         - Fixed low fees ($0.0001 per transaction)
         - Best for: Supply chain, micropayments
       </Accordion>
-      
-      <Accordion title="Sonic (formerly Fantom) - What's the best alternative to Ethereum?">
-        - 10,000+ TPS with 1-second finality
-        - EVM compatible with lower fees
-        - Lachesis consensus for speed
-        - Best for: DeFi, gaming applications
-      </Accordion>
     </Accordions>
   </Tab>
 
@@ -187,6 +180,20 @@ SettleMint's ecosystem provides **everything needed to build, deploy, and scale
         - Nitro upgrade for speed
         - Best for: DeFi protocols, DAOs
       </Accordion>
+
+      <Accordion title="Linea - How do I pair Ethereum security with low fees?">
+        - zkEVM validity rollup backed by Consensys
+        - Sub-cent average transaction costs
+        - Native integrations with MetaMask and Infura
+        - Best for: Regulated DeFi, loyalty, and consumer experiences
+      </Accordion>
+
+      <Accordion title="Base - Which L2 offers the best fiat onramps?">
+        - Built by Coinbase on the OP Stack
+        - Deep USDC and ETH liquidity
+        - Enterprise-grade observability and compliance tooling
+        - Best for: Consumer payments, mainstream app launches
+      </Accordion>
 
       <Accordion title="Soneium - What's Sony's blockchain solution?">
         - Built by Sony for entertainment use cases
@@ -584,4 +591,4 @@ The Asset Tokenization Kit accelerates projects from months to weeks:
 - [Platform Architecture](/concepts/architecture)
 - [Security Best Practices](/concepts/security)
 - [Request a Demo](https://settlemint.com/demo)
-</Callout>
+</Callout>

content/docs/platform-components/blockchain-infrastructure/network-manager.mdx

@@ -30,7 +30,7 @@ Administrators can view logs, receive alerts, and track operational metrics thro
 ### Connect with public networks
 
 - Seamlessly integrate with **Ethereum, Polygon, Hedera, Avalanche, Arbitrum,
-  Optimism, Sonic, Soneium**, and other leading public blockchains, enabling
+  Optimism, Linea, Base, Soneium**, and other leading public blockchains, enabling
   hybrid solutions that leverage both public and private networks.
 
 ### Join external networks
@@ -62,11 +62,12 @@ a summary of the supported networks:
 | Public L1    | Ethereum           | Decentralized blockchain with PoS, known for smart contracts.          |
 | Public L1    | Avalanche          | High-speed chain with subnet support and PoS.                          |
 | Public L1    | Hedera Hashgraph   | Scalable public ledger with aBFT and low fees.                         |
-| Public L1    | Sonic              | High-performance EVM-compatible blockchain with sub-second finality.   |
 | Public L2    | Polygon PoS        | Ethereum sidechain for faster, cheaper transactions.                   |
 | Public L2    | Polygon zkEVM      | Zero-knowledge rollup for efficient Ethereum scaling.                  |
 | Public L2    | Optimism           | Optimistic Rollup solution for Ethereum scalability.                   |
 | Public L2    | Arbitrum           | Optimistic Rollup for improved Ethereum performance and lower fees.    |
+| Public L2    | Linea              | Consensys zkEVM rollup combining Ethereum security with low fees.      |
+| Public L2    | Base               | Coinbase-operated OP Stack network with deep liquidity and compliance. |
 | Public L2    | Soneium            | Ethereum L2 scaling solution with high throughput and low costs.       |
 
 ---
@@ -539,53 +540,6 @@ enterprises, ensures stability and regulatory compliance.
     </tr>
   </tbody>
 </table>
-
----
-
-### Sonic
-
-<div style={{ display: 'flex', alignItems: 'flex-start', gap: '1.5rem' }}>
-  <div style={{ flex: '0 0 15%' }}>
-  ![Sonic](../../../img/blockchain-logos/sonic-logo.png)
-  </div>
-  <div style={{ flex: '1', paddingLeft: '1rem' }}>
-
-Sonic is a high-performance Layer 1 blockchain designed for speed and scalability,
-offering EVM compatibility and sub-second transaction finality. Built by the team
-behind Fantom, it supports up to 10,000 transactions per second, making it ideal
-for DeFi and real-time applications. Its native bridge to Ethereum enhances
-liquidity and interoperability.
-
-  </div>
-</div>
-
-<table>
-  <tbody>
-    <tr>
-      <td style={{width: "50%"}}>
-
-      **Key Features**
-
-      - High throughput with up to 10,000 transactions per second.
-      - Sub-second finality for real-time processing.
-      - EVM compatibility with a secure Ethereum bridge.
-
-      </td>
-      <td style={{width: "50%"}}>
-
-      **Example Use Cases**
-
-      - Real-time DeFi applications.
-      - High-frequency trading platforms.
-      - Scalable gaming and NFT ecosystems.
-
-      </td>
-    </tr>
-  </tbody>
-</table>
-
----
-
 ## Layer 2 (l2) public networks
 
 ### Polygon pos
@@ -763,6 +717,86 @@ and DeFi applications.
 
 ---
 
+### Linea
+
+<div style={{ display: 'flex', alignItems: 'flex-start', gap: '1.5rem' }}>
+  <div style={{ flex: '0 0 15%' }}>
+  ![Linea](../../../img/blockchain-logos/linea-logo.png)
+  </div>
+  <div style={{ flex: '1', paddingLeft: '1rem' }}>
+
+Linea is Consensys' zkEVM-powered Layer 2 that combines Ethereum-grade security with low transaction fees and rapid finality. Native integrations with MetaMask, Infura, and Consensys developer tooling accelerate onboarding for enterprise and consumer applications seeking predictable performance.
+
+  </div>
+</div>
+
+<table>
+  <tbody>
+    <tr>
+      <td style={{width: "50%"}}>
+
+      **Key Features**
+
+      - Type 2 zkEVM equivalence for seamless Solidity deployment.
+      - Zero-knowledge proof aggregation lowering L1 settlement costs.
+      - Roadmap toward decentralized sequencing and shared governance.
+
+      </td>
+      <td style={{width: "50%"}}>
+
+      **Example Use Cases**
+
+      - Regulated DeFi platforms requiring strong compliance tooling.
+      - Consumer loyalty, ticketing, and NFT engagement programs.
+      - Data-rich dApps leveraging low-cost transactions and analytics.
+
+      </td>
+    </tr>
+  </tbody>
+</table>
+
+---
+
+### Base
+
+<div style={{ display: 'flex', alignItems: 'flex-start', gap: '1.5rem' }}>
+  <div style={{ flex: '0 0 15%' }}>
+  ![Base](../../../img/blockchain-logos/base-logo.png)
+  </div>
+  <div style={{ flex: '1', paddingLeft: '1rem' }}>
+
+Base is Coinbase's OP Stack Layer 2 optimized for high-volume consumer applications. It inherits Ethereum security while offering deep liquidity, fiat onramps, and institutional-grade compliance aligned with Coinbase's global operations.
+
+  </div>
+</div>
+
+<table>
+  <tbody>
+    <tr>
+      <td style={{width: "50%"}}>
+
+      **Key Features**
+
+      - Built on the OP Stack with full EVM equivalence.
+      - Coinbase-managed sequencer with transparent decentralization roadmap.
+      - Access to Coinbase Developer Platform observability and APIs.
+
+      </td>
+      <td style={{width: "50%"}}>
+
+      **Example Use Cases**
+
+      - Consumer payment and rewards programs with fiat onramps.
+      - Enterprise-grade Web3 experiences needing compliance and custody.
+      - Social and gaming applications targeting mainstream audiences.
+
+      </td>
+    </tr>
+  </tbody>
+</table>
+
+---
+
 ### Soneium
 
 <div style={{ display: 'flex', alignItems: 'flex-start', gap: '1.5rem' }}>

content/docs/supported-blockchains/L1-public-networks/meta.json

@@ -1,5 +1,5 @@
 {
   "label": "L1 Public Networks",
   "title": "L1 Public Networks",
-  "pages": ["ethereum", "avalanche", "hedera", "sonic"]
+  "pages": ["ethereum", "avalanche", "hedera"]
 }