**Refactor:** Restructure server package to streamline imports and improve file organization

- Moved `providers`, `services`, `models`, `lib`, and related files to `src` directory within `server` package.
- Adjusted imports across the codebase to reflect the new paths.
- Renamed several `.ts` files for consistency.
- Introduced an `index.ts` in the `ai/providers` package to export all providers.

This improves maintainability and aligns with the project's updated directory structure.

packages/server/tsconfig.json

@@ -2,11 +2,10 @@
   "extends": "../../tsconfig.json",
   "compilerOptions": {
     "lib": ["ESNext"],
-    "types": ["vite/client"],
+    "types": ["vite/client", "@types/bun"],
     "esModuleInterop": true,
     "forceConsistentCasingInFileNames": true,
     "outDir": "dist",
-    "rootDir": ".",
     "allowJs": true,
     "jsx": "react-jsx"
   },