Add Lint GitHub workflow

This will help us avoid committing errors.

.github/workflows/lint.yaml

@@ -0,0 +1,22 @@
+name: Lint
+
+on: [push]
+
+jobs:
+  run-linters:
+    name: Run linters
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: 20
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run ESLint
+        run: npm run eslint