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/page.tsx

@@ -17,7 +17,7 @@ import {
 import { useEffect, useState } from "react";
 import useApi from "../../lib/useApi";
 import useRoomList from "./useRoomList";
-import { ApiError, Room } from "../../api";
+import { ApiError, Room } from "../../lib/api-types";
 import { RoomList } from "./_components/RoomList";
 import { PaginationPage } from "../browse/_components/Pagination";