Basic build+test for npm

Author: jpolitz

.github/workflows/npm-test.yml

@@ -0,0 +1,21 @@
+name: Test pyret-npm CLI
+
+on: 
+  workflow_dispatch:
+  push:
+
+jobs:
+  build-test-publish:
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    defaults:
+      run:
+        working-directory: ./npm
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 24
+      - run: npm ci
+      - run: npm run build
+      - run: npm test