feat(close-prs): add composite action to close pull requests#710

jmeridth wants to merge 2 commits intochainguard-dev:mainchainguard-dev/actions:mainfrom

jmeridth:jm_dev_114_create_composite_workflow_to_auto_close_pull_requestsjmeridth/cgactions:jm_dev_114_create_composite_workflow_to_auto_close_pull_requestsCopy head branch name to clipboard