Xonotic Touch Flatpak remote

Latest imported build: 1.2.103
OSTree history is retained (last 40 commits per ref) so older builds remain available for rollback.

flatpak remote-add --user --if-not-exists xonotic-touch \
  https://dixonSolutions.github.io/Xonotic-Touch/flatpak
flatpak install --user xonotic-touch io.github.dixonSolutions.XonoticTouch
flatpak update --user io.github.dixonSolutions.XonoticTouch

# Inspect / roll back to an older commit:
flatpak remote-info --log xonotic-touch io.github.dixonSolutions.XonoticTouch