feat(cursor): Integrate Cursor IDE support with OAuth import token flow

- Add CursorExecutor for handling requests to the Cursor API using protobuf over HTTP/2.
- Implement CursorAuthModal for user token import from local SQLite database.
- Update provider models and constants to include Cursor as a supported provider.
- Enhance API service with token validation and user info extraction from Cursor tokens.
- Introduce utility functions for checksum generation and protobuf encoding/decoding for Cursor API interactions.

src/shared/components/index.js

@@ -21,6 +21,7 @@ export { default as RequestLogger } from "./RequestLogger";
 export { default as KiroAuthModal } from "./KiroAuthModal";
 export { default as KiroOAuthWrapper } from "./KiroOAuthWrapper";
 export { default as KiroSocialOAuthModal } from "./KiroSocialOAuthModal";
+export { default as CursorAuthModal } from "./CursorAuthModal";
 export { default as SegmentedControl } from "./SegmentedControl";
 
 // Layouts