fix: middleware manifest and mappings (#481)

## Summary by Sourcery

Update the Graph middleware guide to use the correct data source list
format in the manifest and fix sample code import paths to point to the
right generated folder.

Bug Fixes:
- Update sample code imports to reference the correct
"generated/generated" directory for schema and API files.

Enhancements:
- Convert the manifest YAML to a list-based dataSources format with
proper indentation and dash prefixes.

Author: bl0up

content/docs/building-with-settlemint/evm-chains-guide/setup-graph-middleware.mdx

@@ -173,33 +173,33 @@ contract (parameter order and types must be accurate), and align them with the
 corresponding handler function names.
 
 ```yaml
-- kind: ethereum/contract
-  name: { id }
-  network: { chain }
-  source:
-    address: "{address}"
-    abi: UserData
-    startBlock: { startBlock }
-  mapping:
-    kind: ethereum/events
-    apiVersion: 0.0.5
-    language: wasm/assemblyscript
-    entities:
-      - UserProfile
-      - ProfileCreated
-      - ProfileUpdated
-      - ProfileDeleted
-    abis:
-      - name: UserData
-        file: "{root}/out/UserData.sol/UserData.json"
-    eventHandlers:
-      - event: ProfileCreated(indexed uint256,string,string,uint8,string,bool)
-        handler: handleProfileCreated
-      - event: ProfileUpdated(indexed uint256,string,string,uint8,string,bool)
-        handler: handleProfileUpdated
-      - event: ProfileDeleted(indexed uint256)
-        handler: handleProfileDeleted
-    file: { file }
+  - kind: ethereum/contract
+    name: {id}
+    network: {chain}
+    source:
+      address: "{address}"
+      abi: UserData
+      startBlock: {startBlock}
+    mapping:
+      kind: ethereum/events
+      apiVersion: 0.0.5
+      language: wasm/assemblyscript
+      entities:
+        - UserProfile
+        - ProfileCreated
+        - ProfileUpdated
+        - ProfileDeleted
+      abis:
+        - name: UserData
+          file: "{root}/out/UserData.sol/UserData.json"
+      eventHandlers:
+        - event: ProfileCreated(indexed uint256,string,string,uint8,string,bool)
+          handler: handleProfileCreated
+        - event: ProfileUpdated(indexed uint256,string,string,uint8,string,bool)
+          handler: handleProfileUpdated
+        - event: ProfileDeleted(indexed uint256)
+          handler: handleProfileDeleted
+      file: {file}
 ```
 
 ### 4. Create userdata.gql.json file
@@ -290,13 +290,13 @@ import {
   ProfileCreated as ProfileCreatedEvent,
   ProfileUpdated as ProfileUpdatedEvent,
   ProfileDeleted as ProfileDeletedEvent,
-} from "../../generated/userdata/UserData";
+} from "../../generated/generated/userdata/UserData";
 import {
   UserProfile,
   ProfileCreated,
   ProfileUpdated,
   ProfileDeleted,
-} from "../../generated/schema";
+} from "../../generated/generated/schema";
 import { fetchUserProfile } from "../fetch/userdata";
 
 export function handleProfileCreated(event: ProfileCreatedEvent): void {
@@ -372,7 +372,7 @@ initialized value to prevent errors during Graph Node processing.
 
 ```ts
 import { BigInt } from "@graphprotocol/graph-ts";
-import { UserProfile } from "../../generated/schema";
+import { UserProfile } from "../../generated/generated/schema";
 
 /**
  * Fetches a UserProfile entity using the given userId.