- Changed action execution from Docker to composite with Python setup.
- Added `TARGET_REPO` input to allow issue creation in a specified repository.
- Updated `GitHubClient` to use `TARGET_REPO` for issue and milestone URLs.
- Enhanced README with instructions for cross-repository usage.
- Introduced example workflow for creating TODO issues in another repository.
Signed-off-by: Shakar Bakr <5h4k4r.b4kr@gmail.com>