Add GitHub Actions workflow for releases

.github/workflows/release.yml

@@ -0,0 +1,99 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - "v*.*.*"
+
+permissions:
+  contents: write
+
+jobs:
+  build-linux:
+    name: Build Linux AppImage
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: "npm"
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Install Linux build deps
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libarchive-tools rpm fakeroot
+
+      - name: Build AppImage
+        run: npm run dist
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Upload Linux artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: linux-dist
+          path: dist/*.AppImage
+          if-no-files-found: error
+
+  build-windows:
+    name: Build Windows Installer
+    runs-on: windows-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: "npm"
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build Windows installer
+        run: npm run dist:win
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Upload Windows artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: windows-dist
+          path: |
+            dist/*.exe
+            dist/*.msi
+          if-no-files-found: error
+
+  release:
+    name: Create GitHub Release
+    needs: [build-linux, build-windows]
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Download all artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: artifacts
+
+      - name: Create release and upload assets
+        uses: softprops/action-gh-release@v2
+        with:
+          name: LegacyLauncher ${{ github.ref_name }}
+          draft: false
+          prerelease: ${{ contains(github.ref_name, '-') }}
+          generate_release_notes: true
+          files: |
+            artifacts/linux-dist/*
+            artifacts/windows-dist/*
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}