Add Linux DEB and Flatpak packaging

Signed-off-by: Loren Eteval <loren.eteval@proton.me>

.github/workflows/deploy-pypi.yml

@@ -122,7 +122,11 @@ jobs:
         run: |
           sudo apt update
           sudo apt install -y libxcb-cursor0 qt6-base-dev patchelf ccache zlib1g-dev
+          sudo apt install -y flatpak flatpak-builder elfutils patchelf
           echo "QMAKE=$(which qmake6)" >> $GITHUB_ENV
+          flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
+          flatpak update
+          flatpak install flathub org.kde.Platform//6.8 org.kde.Sdk//6.8
 
           if [ "$RUNNER_ARCH" == "X64" ]; then
             linuxdeploy_arch="x86_64"
@@ -219,6 +223,8 @@ jobs:
             Furious-*.zip
             Furious-*.dmg
             Furious-*.AppImage
+            Furious-*.deb
+            Furious-*.flatpak
 
   github-release:
     name: Upload to GitHub Release