Add CI workflow to run Jest tests on PRs

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Co-authored-by: jbampton <418747+jbampton@users.noreply.github.com>

Author: Copilot

.github/workflows/ci.yml

@@ -0,0 +1,27 @@
+name: CI
+
+permissions:
+  contents: read
+
+on: [pull_request]
+
+jobs:
+  test:
+    name: 🧪 Run tests on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+      - name: Setup Node.js
+        uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
+        with:
+          node-version: 24
+      - name: Install dependencies
+        run: npm install
+      - name: Run tests
+        run: npm test