010a69c7d6
- Added 7 GitHub CLI tools (repo view, issue view, PR view, PR diff, PR search, issue search, run watch) for repository and workflow operations. - Added `github.enabled` setting to gate read-only GitHub CLI tools, disabled by default. - Added bundled `/green` command for iterative CI failure fixing with optional git tag instructions. - Implemented gh-cli module with GitHub CLI command execution utilities and output parsing. - Added comprehensive test coverage for GitHub tools and custom commands with mocked CLI interactions.