CI: Make AppImage

.github/workflows/build.yml

@@ -79,6 +79,38 @@ jobs:
           chmod +x ./publish_gtk/Ryujinx.Gtk3 ./publish_gtk/Ryujinx.sh
         if: github.event_name == 'pull_request' && matrix.platform.os == 'ubuntu-latest'
 
+      - name: Make AppImage
+        run: |
+          sudo apt install zsync desktop-file-utils
+          APPIMAGETOOL="https://github.com/AppImage/appimagetool/releases/download/continuous/appimagetool-x86_64.AppImage"
+          DESKTOP="https://raw.githubusercontent.com/ryujinx-mirror/Ryujinx/master/distribution/linux/Ryujinx.desktop"
+          ICON="https://raw.githubusercontent.com/ryujinx-mirror/Ryujinx/master/src/Ryujinx/Ryujinx.ico"
+          mkdir -p ./AppDir/usr/bin && cp -r ./publish/* ./AppDir/usr/bin
+          wget -q "$APPIMAGETOOL" -O ./appimagetool
+          wget $DESKTOP -O ./AppDir/Ryujinx.desktop 
+          wget $ICON -O ./AppDir/Ryujinx.png && ln -s Ryujinx.png ./AppDir/.DirIcon
+          printf '%s\n%s\n%s\n' '#!/bin/sh' 'CURRENTDIR="$(readlink -f "$(dirname "$0")")"' \
+            'exec "$CURRENTDIR"/usr/bin/Ryujinx.sh "$@"' > ./AppDir/AppRun
+          chmod +x ./AppDir/AppRun ./appimagetool ./AppDir/usr/bin/Ryujinx*
+          ./appimagetool --comp zstd --mksquashfs-opt -Xcompression-level --mksquashfs-opt 21 \
+            -u "gh-releases-zsync|$GITHUB_REPOSITORY_OWNER|Ryujinx|latest|*.AppImage.zsync" \
+            ./AppDir Ryujinx.AppImage
+        if: github.event_name == 'pull_request' && matrix.platform.os == 'ubuntu-latest' && matrix.platform.name != 'linux-arm64'
+
+      - name: Upload Ryujinx AppImage
+        uses: actions/upload-artifact@v4
+        with:
+          name: ryujinx-${{ matrix.configuration }}-${{ env.RYUJINX_BASE_VERSION }}+${{ steps.git_short_hash.outputs.result }}.AppImage
+          path: Ryujinx.AppImage
+        if: github.event_name == 'pull_request' && matrix.platform.name != 'linux-arm64' && matrix.platform.os != 'macos-13'
+
+      - name: Upload Ryujinx AppImage zsync
+        uses: actions/upload-artifact@v4
+        with:
+          name: ryujinx-${{ matrix.configuration }}-${{ env.RYUJINX_BASE_VERSION }}+${{ steps.git_short_hash.outputs.result }}.AppImage.zsync
+          path: Ryujinx.AppImage.zsync
+        if: github.event_name == 'pull_request' && matrix.platform.name != 'linux-arm64' && matrix.platform.os != 'macos-13'
+
       - name: Upload Ryujinx artifact
         uses: actions/upload-artifact@v4
         with: