Add a GitHub Actions workflow that runs on pull_request_target (opened, labeled) for main and automatically closes PRs labeled "new script" when the author is not an allowed bot or a member of the "contributor" team. The workflow comments explaining that new scripts must be submitted to the ProxmoxVED testing repo, closes the PR, and adds a "not a script issue" label. It scopes execution to the community-scripts/ProxmoxVE repo, uses a coolify-runner, and requires pull-requests: write and contents: read permissions.
