Add workflow for ESLint

.github/workflows/lint.yml

@@ -0,0 +1,46 @@
+name: ESLint
+
+on:
+  pull_request:
+    types: [opened, synchronize]
+
+concurrency:
+  group: eslint-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    env:
+      CI: true
+    steps:
+      - name: Checkout
+        uses: actions/checkout@4
+
+      - name: Remove version from package-lock.json
+        run: jq 'del(.version, .packages[""].version)' package-lock.json > normalized-package-lock.json
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm
+          cache-dependency-path: normalized-package-lock.json
+
+      - name: Cache node_modules
+        id: cache-node-modules
+        uses: actions/cache@v4
+        with:
+          path: node_modules
+          key: ${{ runner.os }}-node-modules-${{ hashFiles('package-lock.json') }}
+
+      - name: Run npm install
+        if: steps.cache-node-modules.outputs.cache-hit != 'true'
+        uses: nick-fields/retry@3f757583fb1b1f940bc8ef4bf4734c8dc02a5847
+        with:
+          timeout_minutes: 30
+          max_attempts: 3
+          command: npm ci
+
+      - name: Run ESLint
+        run: npm run lint