feat: add github action for auto build, deploy and release

Author: evgo2017

.github/workflows/build.yml

@@ -0,0 +1,64 @@
+name: Build, Deploy and Release
+
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - 'v*'
+  pull_request:
+    branches:
+      - main
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Build project
+        run: npm run build
+
+      - name: Upload Artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: live2d-widget-dist
+          path: dist/
+
+      # 1. Deploy demo to GitHub Pages
+      - name: Deploy Demo
+        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./
+          # Peaceiris action handles adding the built 'dist' even if it's ignored in .gitignore
+          # because we are publishing the directory after the build step.
+
+      # 2. Create Release and Upload Assets (on tag)
+      - name: Archive dist for release
+        if: startsWith(github.ref, 'refs/tags/v')
+        run: |
+          zip -r live2d-widget-dist.zip dist/
+
+      - name: Create Release
+        if: startsWith(github.ref, 'refs/tags/v')
+        uses: softprops/action-gh-release@v2
+        with:
+          files: live2d-widget-dist.zip
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}