GitHub Actions: Runs eslint on changes

.github/workflows/eslint.yaml

@@ -0,0 +1,41 @@
+name: Linter
+
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+jobs:
+  # `eslint` static analyzer
+  #
+  # The package.json also has a format script built on `prettier`,
+  # but that is already integrated into `eslint` and not invoked
+  # separately here.
+  run-eslint:
+    name: Run eslint TypeScript Linter
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        id: checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        id: setup-node
+        uses: actions/setup-node@v4
+        with:
+          cache: npm
+
+      - name: Install Dependencies
+        id: npm-ci
+        run: npm ci
+
+      - name: Run Lint Script
+        id: npm-lint
+        run: npm run lint