desktop: Add wix config and build msi as part of release

.github/workflows/release_nightly.yml

@@ -117,6 +117,13 @@ jobs:
           sudo apt-get update
           sudo apt install -y libasound2-dev libxcb-shape0-dev libxcb-xfixes0-dev libgtk-3-dev libudev-dev
 
+      - name: Install WiX
+        run: |
+          dotnet tool install --global wix
+          wix extension add -g WixToolset.UI.wixext
+          wix extension add -g WixToolset.Util.wixext
+        if: runner.os == 'Windows'
+
       - name: Cargo build
         run: cargo build --locked --package ruffle_desktop --release ${{matrix.DESKTOP_FEATURES && '--features' }} ${{matrix.DESKTOP_FEATURES}} ${{ matrix.target && '--target' }} ${{ matrix.target }}
         env:
@@ -129,6 +136,15 @@ jobs:
           cp README.md package/README.md
           cp LICENSE.md package/LICENSE.md
 
+      - name: Package MSI
+        run: |
+          cd desktop/wix
+          wix build ruffle.wxs -ext WixToolset.UI.wixext -ext WixToolset.Util.wixext -arch x64 -o ../../package/setup.msi -pdbtype none
+        env:
+          RUFFLE_VERSION: "0.1.0"
+          CARGO_BUILD_DIR: target/${{ matrix.target }}/release
+        if: runner.os == 'Windows'
+
       - name: Package Windows
         if: runner.os == 'Windows'
         run: |