[Request] A flatpak runtime package

An arch package would help installation. I'm also looking into a sharun appimage for this.

Edit: flatpak should be prioritized over arch as its universal

No files, tests, or entry points are identified in the issue. Start by surveying the repository's release and packaging configuration, then review Flatpak runtime metadata requirements. Done means the Java runtime is distributed as a working Flatpak package, with the intended scope distinguished from the mentioned Arch package and AppImage.

Written by the indexing model from the issue text.