fix: resolve import errors and add missing api hooks

- Create constants.ts for RECORD_A_MEETING_URL
- Add api-types.ts for backward compatible type exports
- Update all imports from deleted api folder to new locations
- Add missing React Query hooks for rooms and zulip operations
- Create useApi compatibility layer for unmigrated components

www/app/(app)/rooms/useRoomList.tsx

@@ -1,5 +1,5 @@
 import { useRoomsList } from "../../lib/api-hooks";
-import { Page_Room_ } from "../../api";
+import { Page_Room_ } from "../../lib/api-types";
 import { PaginationPage } from "../browse/_components/Pagination";
 
 type RoomList = {