refactor: add import maps for generated code

- Add export mappings in @fileone/convex package.json for cleaner imports
- Map @fileone/convex/dataModel to _generated/dataModel.d.ts
- Map @fileone/convex/api to _generated/api.js
- Map @fileone/convex/server to _generated/server.js
- Update all imports across packages/convex and apps/drive-web
- Maintain backward compatibility with _generated/* exports

Co-authored-by: Ona <no-reply@ona.com>

packages/convex/model/user.ts

@@ -1,4 +1,4 @@
-import type { MutationCtx, QueryCtx } from "../_generated/server"
+import type { MutationCtx, QueryCtx } from "@fileone/convex/server"
 import { authComponent } from "../auth"
 import * as Err from "../shared/error"