add: gh workflow for build and release

Author: carsakiller

.github/workflows/main.yml

@@ -0,0 +1,28 @@
+name: Main
+
+on:
+  push:
+    branches: ["main"]
+    tags: ["*"]
+  pull_request:
+    branches: ["main"]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: 16.x
+          cache: "npm"
+      - run: npm ci
+      - run: npm run build
+      - uses: softprops/action-gh-release@v1
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          files: |
+            out/index.js
+            action.yml