add test workflow for PRs

Run test suite on all PRs and pushes to main using Node 20.

Author: 27Bslash6

.github/workflows/test.yml

@@ -0,0 +1,25 @@
+name: Test
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+jobs:
+  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: '20'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run tests
+        run: npm test