ci: introduces basic CI pipeline

.github/workflows/CI.yml

@@ -0,0 +1,18 @@
+name: CI
+
+on:
+  push:
+    branches: main
+  pull_request:
+
+jobs:
+  format:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: latest
+      - run: node --version; npm --version; npx prettier --version
+      - run: ls; pwd;
+      - run: npx prettier . --check