Added Continuous Integration (CI) Workflow (#1)

.github/workflows/ci.yml

@@ -0,0 +1,24 @@
+name: Continuous Integration
+
+on:
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macOS-latest]
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Use Node.js 18.x
+      uses: actions/setup-node@v3
+      with:
+        node-version: 18.x
+        cache: 'npm'
+    - run: npm ci
+    - run: npm run build --if-present
+    - run: npm test --if-present