ci: run Jest tests (includes v3.1 LensEnforcer smoke)

Author: mrhpython

soulfield-v2-mvp/.github/workflows/ci.yml

@@ -0,0 +1,13 @@
+name: CI
+on: [push, pull_request]
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix: { node: [20.x, 22.x] }
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with: { node-version: ${{ matrix.node }} }
+      - run: npm ci || npm i
+      - run: npm test