refactor(api): remove AI worker, add ai api route, add usage tiers

- Remove separate AI worker service
- Added generation limits:
  FREE: 1000/month (For the beta version)
  PRO: 500/month
  ENTERPRISE: 1000/month
- Integrate AI functionality into main API routes
- Added monthly generations reset and usage tier upgrade API routes
- Upgrade tier page to be added along with profile page section

frontend/components/editor/index.tsx

@@ -949,7 +949,6 @@ export default function CodeEditor({
           {generate.show ? (
             <GenerateInput
               user={userData}
-              socket={socket!}
               width={generate.width - 90}
               data={{
                 fileName: tabs.find((t) => t.id === activeFileId)?.name ?? "",