Added CI job for core

Author: BobDickinson

.github/workflows/core_tests.yml

@@ -0,0 +1,30 @@
+name: Core Tests
+
+on:
+  push:
+    paths:
+      - "core/**"
+  pull_request:
+    paths:
+      - "core/**"
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v6
+        with:
+          node-version-file: package.json
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci --ignore-scripts
+
+      - name: Build core
+        run: npm run build-core
+
+      - name: Run core tests
+        run: npm run test-core