ci: run ESLint on pull requests

Author: ssoelvsten

.github/workflows/eslint.yml

@@ -0,0 +1,19 @@
+name: ESLint
+
+on: [pull_request]
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+
+      - name: Install NPM dependencies
+        run: |
+          npm ci
+          npm install -g typescript
+
+      - name: Run ESlint
+        run: |
+          cd rt
+          npx eslint src