Analyse GitHub repository activity and current state. Usage - If no repo specified, uses current git repository. Analysis Sections Issues - Total open/closed, by label, recently active (7d), stale ( 30d), average close time Pull Requests - Open PRs with review status, recently merged (7d), review turnaround, awaiting review, drafts Activity Metrics - Commit frequency, active contributors (30d), code review participation, release cadence Detailed Summaries - Each open issue with latest comment preview - Each open PR with review status and changes summary Implementation 1. Check for repo contex…