gh add branch protection

gh add branch protection.md

gh api repos/username/repo_name/branches/main/protection \
  --method PUT \
  --input - <<'JSON'
{
  "required_status_checks": null,
  "enforce_admins": true,
  "required_pull_request_reviews": {
    "dismiss_stale_reviews": false,
    "require_code_owner_reviews": true,
    "require_last_push_approval": false,
    "required_approving_review_count": 1
  },
  "restrictions": null,
  "required_linear_history": false,
  "allow_force_pushes": false,
  "allow_deletions": false,
  "block_creations": false,
  "required_conversation_resolution": false,
  "lock_branch": true,
  "allow_fork_syncing": false
}
JSON