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/package.json

@@ -6,6 +6,9 @@
 		"./filesystem": "./shared/filesystem.ts",
 		"./error": "./shared/error.ts",
 		"./types": "./shared/types.ts",
+		"./dataModel": "./_generated/dataModel.d.ts",
+		"./api": "./_generated/api.js",
+		"./server": "./_generated/server.js",
 		"./_generated/*": "./_generated/*",
 		"./model/*": "./model/*",
 		"./shared/*": "./shared/*"