Switch to GitHub Actions for AppImage builds

.github/workflows/build-appimage.yml

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+name: Build Linux AppImage
+
+on:
+  push:
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  build:
+    runs-on: ubuntu-22.04
+
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+        with:
+          submodules: 'recursive'
+          fetch-depth: 1
+
+      - name: Setup environment
+        run: |
+          wget -qO - https://packages.lunarg.com/lunarg-signing-key-pub.asc | sudo apt-key add -
+          sudo wget -qO /etc/apt/sources.list.d/lunarg-vulkan-1.4.313-jammy.list https://packages.lunarg.com/vulkan/1.4.313/lunarg-vulkan-1.4.313-jammy.list
+          sudo apt update
+          sudo apt install -y qt6-base-dev qt6-declarative-dev libqt6svg6-dev qml6-module-qtquick-controls qml6-module-qtquick-templates qml6-module-qtquick-layouts \
+            qml6-module-qtqml-workerscript qml6-module-qtquick-window qml6-module-qtquick python3-pip nasm libgbm-dev libdrm-dev libfreetype-dev libasound2-dev \
+            libdbus-1-dev libegl1-mesa-dev libgl1-mesa-dev libgles2-mesa-dev libglu1-mesa-dev libibus-1.0-dev libpulse-dev libudev-dev libx11-dev libxcursor-dev \
+            libxext-dev libxi-dev libxinerama-dev libxkbcommon-dev libxrandr-dev libxss-dev libxt-dev libxv-dev libxxf86vm-dev libxcb-dri3-dev libx11-xcb-dev \
+            wayland-protocols libopus-dev libvdpau-dev libgl-dev libpipewire-0.3-dev vulkan-sdk
+          sudo pip3 install meson
+          mkdir -p dep_root/{bin,include,lib}
+          echo "DEP_ROOT=$PWD/dep_root" >> $GITHUB_ENV
+          echo "$PWD/dep_root/bin" >> $GITHUB_PATH
+
+      - name: Set CI version
+        run: |
+          CI_VERSION=`echo $GITHUB_SHA | cut -c1-6`
+          echo "CI_VERSION=$CI_VERSION" >> $GITHUB_ENV
+
+      - name: Checkout SDL
+        uses: actions/checkout@v4
+        with:
+          repository: libsdl-org/SDL
+          ref: 235e4870af091ea7e3814ee2dbdb8e2ec627aaf0
+          path: deps/SDL
+
+      - name: Build SDL
+        working-directory: deps/SDL
+        run: |
+          ./autogen.sh
+          ./configure
+          make -j$(nproc)
+          sudo make install
+
+      - name: Checkout SDL_ttf
+        uses: actions/checkout@v4
+        with:
+          repository: libsdl-org/SDL_ttf
+          ref: release-2.22.0
+          path: deps/SDL_ttf
+          submodules: 'recursive'
+
+      - name: Build SDL_ttf
+        working-directory: deps/SDL_ttf
+        run: |
+          ./autogen.sh
+          ./configure
+          make -j$(nproc)
+          sudo make install
+
+      - name: Checkout libva
+        uses: actions/checkout@v4
+        with:
+          repository: intel/libva
+          ref: 2.22.0
+          path: deps/libva
+
+      - name: Build libva
+        working-directory: deps/libva
+        run: |
+          ./autogen.sh
+          ./configure --enable-x11
+          make -j$(nproc)
+          sudo make install
+
+      - name: Checkout libplacebo
+        uses: actions/checkout@v4
+        with:
+          repository: haasn/libplacebo
+          ref: 63a3d64ac32eaaa56aa60b5000d43c02544c6508
+          path: deps/libplacebo
+          submodules: 'recursive'
+
+      - name: Build libplacebo
+        working-directory: deps/libplacebo
+        run: |
+          git apply ../../app/deploy/linux/appimage/*.patch
+          meson setup build -Dvulkan=enabled -Dopengl=disabled -Ddemos=false
+          ninja -C build
+          sudo ninja install -C build
+
+      - name: Build dav1d
+        working-directory: deps
+        env:
+          DAV1D_VER: 1.5.1
+        run: |
+          git clone --branch $DAV1D_VER --depth 1 https://code.videolan.org/videolan/dav1d.git
+          pushd dav1d
+          meson setup build -Ddefault_library=static -Dbuildtype=release -Denable_tools=false -Denable_tests=false
+          ninja -C build
+          sudo ninja install -C build
+          popd
+
+      - name: Checkout FFmpeg
+        uses: actions/checkout@v4
+        with:
+          repository: FFmpeg/FFmpeg
+          ref: dd00a614e16a15db0b230dfe45790e913e593695
+          path: deps/FFmpeg
+
+      - name: Build FFmpeg
+        working-directory: deps/FFmpeg
+        run: |
+          ./configure --enable-pic --disable-static --enable-shared --disable-all --disable-autodetect --enable-avcodec --enable-avformat --enable-swscale \
+            --enable-decoder=h264 --enable-decoder=hevc --enable-decoder=av1 \
+            --enable-vaapi --enable-hwaccel=h264_vaapi --enable-hwaccel=hevc_vaapi --enable-hwaccel=av1_vaapi \
+            --enable-vdpau --enable-hwaccel=h264_vdpau  --enable-hwaccel=hevc_vdpau --enable-hwaccel=av1_vdpau \
+            --enable-libdrm --enable-vulkan --enable-hwaccel=h264_vulkan --enable-hwaccel=hevc_vulkan --enable-hwaccel=av1_vulkan \
+            --enable-libdav1d --enable-decoder=libdav1d
+          make -j$(nproc)
+          sudo make install
+
+      - name: Install linuxdeployqt
+        working-directory: dep_root/bin
+        run: |
+          wget -O linuxdeployqt https://github.com/probonopd/linuxdeployqt/releases/download/continuous/linuxdeployqt-continuous-x86_64.AppImage
+          chmod a+x linuxdeployqt
+
+      - name: Build Binaries
+        run: |
+          sudo ldconfig
+          scripts/build-appimage.sh
+
+      - name: Upload Binaries
+        uses: actions/upload-artifact@v4
+        with:
+          name: Moonlight-LinuxAppImage-${{ env.CI_VERSION }}
+          path: build/installer-release/Moonlight-${{ env.CI_VERSION }}-x86_64.AppImage
+          compression-level: 0
+          if-no-files-found: error