Add basic CI

.github/workflows/ci.yml

@@ -0,0 +1,43 @@
+name: CI
+
+on:
+  push:
+    branches: [ master, main ]
+  pull_request:
+    branches: [ master, main ]
+  workflow_dispatch:
+    inputs:
+      run_benchmark:
+        description: 'Run benchmark'
+        required: false
+        default: 'false'
+        type: choice
+        options:
+        - 'true'
+        - 'false'
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Setup Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: '18'
+
+    - name: Install dependencies
+      run: npm install
+
+    - name: Build
+      run: npm run build
+
+    - name: Run tests
+      run: npm test
+
+    - name: Run benchmark
+      if: github.event.inputs.run_benchmark == 'true'
+      run: npm run bench