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/shared/filesystem.ts

@@ -4,7 +4,7 @@
  * NO server-only dependencies should be imported here.
  */
 
-import type { Doc, Id } from "../_generated/dataModel"
+import type { Doc, Id } from "@fileone/convex/dataModel"
 import type * as Err from "./error"
 
 export enum FileType {

packages/convex/shared/types.ts

@@ -3,7 +3,7 @@
  * This file should NOT import any server-only dependencies.
  */
 
-import type { Doc } from "../_generated/dataModel"
+import type { Doc } from "@fileone/convex/dataModel"
 import type { DirectoryPath } from "./filesystem"
 
 export type DirectoryInfo = Doc<"directories"> & { path: DirectoryPath }