add region-recorder - #656

the `- **Id:**` field; the `- **Noctalia version tested against:**` field; the `- **Plugin API level:**` field; the checklist entry: `README.md` follows the [README template](https://github.com/noctalia-dev/community-plugins/blob/main/README_TEMPLATE.md), documents every entry id and dependency, and includes exact panel IPC commands and launcher prefixes where applicable.; the checklist entry: `thumbnail.webp` is present and relevant; for a new plugin I created it with the [thumbnail generator](https://assets.noctalia.dev/plugins/thumbnail-generator.html), and for an update I regenerated it with the generator if the visual identity or user-facing appearance changed.