Added support links and improved release metadata.

What’s New

  • Added metadata.json version preview in release.sh before confirmation
  • Added donations field to metadata.json with Buy Me a Coffee link
  • Added Buy Me a Coffee support section to README
  • Added FUNDING.yml with Buy Me a Coffee link

Changed

  • Moved metadata.json version bump from changelog.sh to release.sh
  • Fixed metadata version to current on GNOME Extensions
  • Documented when not to create a release in RELEASING.md