chore: move CI to GHA (#2007)

* chore: naive CI

* simpler checkout

Author: louis-bompart

.github/workflows/ci.yml

@@ -0,0 +1,16 @@
+name: CI
+on:
+  pull_request:
+
+jobs:
+  CI:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version-file: ".nvmrc"
+          cache: npm
+      - run: npm ci
+      - run: npm run build
+      - run: npm test