* Update README.md and labeler.ts to clarify permissions for GitHub Labeler Action
* Update dist/index.js with latest build changes
* Update README.md to clarify manual label creation as an alternative to granting issues write permission
* Fix labeler error handling to ensure case-insensitive check for unauthorized access
* Refactor error handling in labeler to throw an error for unauthorized access instead of logging
* Add tests for labeler error handling and improve error reporting
