Github Pr Merge

This handles the full PR merge ceremony so you don't skip steps. It validates that all review comments have replies (blocks the merge if they don't), runs tests and lint, checks CI status, and warns if you forgot to assign a milestone. Always shows you a checklist summary before merging, uses merge commits instead of squash, auto-deletes the feature branch, and checks if the milestone is done afterward. The merge message format is refreshingly terse, just bullets for changes plus one-liners for review stats and test coverage. Good for teams that want enforcement on the boring pre-merge stuff without writing the same bash incantations every time.