refactor: migrate API from Apollo Server to Mercurius and enhance GraphQL implementation

- Replaced Apollo Server with Mercurius for GraphQL API
- Updated resolvers to use Mercurius-compatible GraphQL implementation
- Migrated from Express to Fastify for server framework
- Improved error handling with GraphQL error extensions
- Added Zod for environment variable validation
- Updated Prisma schema and migrations
- Configured CORS and WebSocket subscriptions
- Simplified GraphQL schema and resolver structure
- Enhanced type safety and code organization

packages/typescript-config/nextjs.json

@@ -1,12 +0,0 @@
-{
-  "$schema": "https://json.schemastore.org/tsconfig",
-  "extends": "./base.json",
-  "compilerOptions": {
-    "plugins": [{ "name": "next" }],
-    "module": "ESNext",
-    "moduleResolution": "Bundler",
-    "allowJs": true,
-    "jsx": "preserve",
-    "noEmit": true
-  }
-}

packages/typescript-config/solid.json

@@ -2,6 +2,7 @@
   "$schema": "https://json.schemastore.org/tsconfig",
   "extends": "./base.json",
   "compilerOptions": {
-    "jsx": "react-jsx"
+    "jsx": "preserve",
+    "jsxImportSource": "solid-js"
   }
 }