* Linux: Export symbolic icon in Flatpak manifest
* GitHub Actions: Add Flatpak action
Help make sure any Linux changes don't break the Flatpak build.
* GitHub Actions: Add Godot PCK export
Helpful for testing Linux releases
* MetaInfo: Update release info
* Linux: update metainfo for 2025.01.16 release
I also corrected the last screenshot caption; I said 18 levels for some reason when it's five worlds and over 30 levels.
* Linux: Update Flatpak manifest with latest PCK release
Adds the source (to be used with [App Icon Preview]) as well as the
exported SVG. I redrew the existing icon as a vector in Inkscape,
matched the square shape recommended by GNOME and Flathub, pixel-aligned
it to reduce blurryness at some scales, and added a GNOME-style shape
shading.
I think it comes through pretty nicely as the original crate but in a
style that is very at-home on GNOME.
[App Icon Preview]:
https://flathub.org/apps/org.gnome.design.AppIconPreview
This contains everything needed for a Flatpak build and Flathub release!
We'll want to point the PCK download to a release made on the upstream
repo before submitting to Flathub.
