docs: restructure documentation hierarchy and content

- Replace getting-started and concepts with new structure:
  - Overview (with Brasa Protocol, stFOGO, Unstaking & Fees subsections)
  - Developers (with source code, program addresses)
  - Security & Audits (with SPL audit info, bug bounty program)
  - Legal (terms of service)
  - Media Kit (with download link)

- Add comprehensive content for all sections based on product requirements
- Create GitHubIcon component for developer section
- Update home page to match new documentation structure
- Configure all top-level sections as collapsed with breadcrumbs disabled
- Add asIndexPage support for Overview section

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: bernatfp

components/icons/GitHubIcon.tsx

@@ -0,0 +1,13 @@
+import React from 'react'
+
+interface GitHubIconProps {
+  className?: string
+}
+
+export function GitHubIcon({ className = 'w-6 h-6' }: GitHubIconProps) {
+  return (
+    <svg viewBox="0 0 16 16" fill="currentColor" className={className} aria-hidden="true">
+      <path d="M8 0C3.58 0 0 3.58 0 8c0 3.54 2.29 6.53 5.47 7.59.4.07.55-.17.55-.38 0-.19-.01-.82-.01-1.49-2.01.37-2.53-.49-2.69-.94-.09-.23-.48-.94-.82-1.13-.28-.15-.68-.52-.01-.53.63-.01 1.08.58 1.23.82.72 1.21 1.87.87 2.33.66.07-.52.28-.87.51-1.07-1.78-.2-3.64-.89-3.64-3.95 0-.87.31-1.59.82-2.15-.08-.2-.36-1.02.08-2.12 0 0 .67-.21 2.2.82.64-.18 1.32-.27 2-.27.68 0 1.36.09 2 .27 1.53-1.04 2.2-.82 2.2-.82.44 1.1.16 1.92.08 2.12.51.56.82 1.27.82 2.15 0 3.07-1.87 3.75-3.65 3.95.29.25.54.73.54 1.48 0 1.07-.01 1.93-.01 2.19 0 .21.15.46.55.38A8.013 8.013 0 0016 8c0-4.42-3.58-8-8-8z" />
+    </svg>
+  )
+}

components/icons/index.ts

@@ -0,0 +1 @@
+export { GitHubIcon } from './GitHubIcon'

content/_meta.ts

@@ -1,5 +1,37 @@
 export default {
   index: 'Home',
-  'getting-started': 'Getting Started',
-  concepts: 'Concepts',
+  overview: {
+    theme: {
+      collapsed: true,
+    },
+    title: 'Overview',
+  },
+  developers: {
+    theme: {
+      collapsed: true,
+      breadcrumb: false,
+    },
+    title: 'Developers',
+  },
+  'security-audits': {
+    theme: {
+      collapsed: true,
+      breadcrumb: false,
+    },
+    title: 'Security & Audits',
+  },
+  legal: {
+    theme: {
+      collapsed: true,
+      breadcrumb: false,
+    },
+    title: 'Legal',
+  },
+  'media-kit': {
+    theme: {
+      collapsed: true,
+      breadcrumb: false,
+    },
+    title: 'Media Kit',
+  },
 }

content/concepts/_meta.ts

@@ -0,0 +1,42 @@
+import { Cards } from 'nextra/components'
+import { GitHubIcon } from '@/components/icons'
+
+# Developers
+
+Developers can integrate with Brasa through the SPL Stake Pool deployment on
+Fogo. stFOGO is implemented as a standard SPL Token, making it compatible with
+existing Solana tooling and infrastructure.
+
+## Source Code
+
+Fogo's Stake Pool deployment is a fork of the canonical SPL Stake Pool program
+with modifications to support the Fogo blockchain and its features. The source
+code and SDKs are available on GitHub:
+
+<Cards>
+  <Cards.Card
+    icon={<GitHubIcon />}
+    title="Fogo Stake Pool"
+    href="https://github.com/Firstset/stake-pool-fogo"
+    arrow
+    target="_blank"
+  />
+</Cards>
+
+## Program Addresses
+
+### Testnet
+
+| Component              | Address                                        |
+| ---------------------- | ---------------------------------------------- |
+| SPL Stake Pool Program | `SPRe2ae9JQhySheYsSANX6M8tUZLt5bQonnBJ6Wu6Ud`  |
+| Brasa Pool             | `4yoj9HDiL2pujuh2ME5MJJ6roLseTAkFqLmA4SrG7Yi9` |
+| stFOGO Mint            | `6FzCV3CDRh7fkxdsJgevtVxU9t5bZ6jiJVYUNCk8eVU7` |
+
+### Mainnet
+
+| Component              | Address |
+| ---------------------- | ------- |
+| SPL Stake Pool Program | TBD     |
+| Brasa Pool             | TBD     |
+| stFOGO Mint            | TBD     |