ci: add npmscan pull request scan

.github/workflows/npmscan.yml

@@ -0,0 +1,22 @@
+name: npmscan
+
+on:
+  pull_request:
+    paths:
+      - package.json
+      - package-lock.json
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  scan:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v7
+      - uses: NPMscan/npmscan-action@de14168f65640a4ed1f0e82ad3ad8c80483d360d # v1.3.0
+        with:
+          file: package-lock.json
+          mode: warn
+          fail-on-error: false