github: add eslint action

.github/workflows/eslint.yml

@@ -0,0 +1,49 @@
+name: ESLint
+
+on:
+  push:
+    branches: [ "main" ]
+    paths:
+      - "scripts/**"
+      - ".eslintrc.js"
+      - ".github/workflows/eslint.yml"
+  pull_request:
+    branches: [ "main" ]
+    paths:
+      - "scripts/**"
+      - ".eslintrc.js"
+      - ".github/workflows/eslint.yml"
+  schedule:
+    # Run at 1:45am every Wednesday
+    - cron: '45 1 * * 3'
+  workflow_dispatch:
+
+jobs:
+  eslint:
+    name: Run eslint scanning
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      security-events: write
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Install ESLint
+        run: |
+          npm install [email protected]
+          npm install @microsoft/[email protected]
+
+      - name: Run ESLint
+        run: npx eslint scripts
+          --config .eslintrc.js
+          --ext .js,.jsx,.ts,.tsx
+          --format @microsoft/eslint-formatter-sarif
+          --output-file eslint-results.sarif
+        continue-on-error: true
+
+      - name: Upload analysis results to GitHub
+        uses: github/codeql-action/upload-sarif@v2
+        with:
+          sarif_file: eslint-results.sarif
+          wait-for-processing: true