Feat: produce an .msi for windows CI

.github/workflows/release.yml

@@ -141,6 +141,21 @@ jobs:
           name: ${{ matrix.artifact }}-desktop
           path: target/${{ matrix.target }}/release/cagire-desktop.exe
 
+      - name: Install cargo-wix (Windows)
+        if: runner.os == 'Windows'
+        run: cargo install cargo-wix
+
+      - name: Build MSI installer (Windows)
+        if: runner.os == 'Windows'
+        run: cargo wix --no-build --nocapture -C -p -C x64
+
+      - name: Upload MSI installer (Windows)
+        if: runner.os == 'Windows'
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ matrix.artifact }}-msi
+          path: target/wix/*.msi
+
       - name: Upload CLAP artifact
         uses: actions/upload-artifact@v4
         with:
@@ -364,6 +379,8 @@ jobs:
             elif [[ "$name" == *-vst3 ]]; then
               base="${name%-vst3}"
               cd "$dir" && zip -r "../../release/${base}-vst3.zip" cagire-plugins.vst3 && cd ../..
+            elif [[ "$name" == *-msi ]]; then
+              cp "$dir"/*.msi release/
             elif [[ "$name" == *-appimage ]]; then
               cp "$dir"/*.AppImage release/
             elif [[ "$name" == *-desktop ]]; then