CI: first workflow: only lint

.github/workflows/main.yml

@@ -0,0 +1,24 @@
+---
+name: rerobots JS tests
+on:
+    push:
+    pull_request:
+jobs:
+    build-and-test:
+        name: Build and test
+        runs-on: ubuntu-22.04
+        strategy:
+            matrix:
+                node: ['18.18', '20', '22.4']
+        steps:
+            - uses: actions/checkout@v4
+            - uses: actions/setup-node@v4
+              with:
+                node-version: ${{ matrix.node }}
+                cache: yarn
+            - name: Installation
+              run: yarn install --frozen-lockfile
+            - name: Lint
+              run: |
+                yarn format:check
+                yarn lint