add simple gh workflow

.github/workflows/validate.yml

@@ -0,0 +1,35 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Setup pnpm
+        uses: pnpm/[email protected]
+        with:
+          version: 8
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: pnpm
+
+      - name: Install Dependencies
+        run: pnpm install
+
+      - name: Lint
+        run: pnpm lint
+
+      - name: Build
+        run: pnpm build