add CI/CD workflow

Author: ghost-clio

.github/workflows/test.yml

@@ -0,0 +1,13 @@
+name: CI
+on: [push, pull_request]
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+      - run: npm ci
+      - run: npx hardhat compile
+      - run: npx hardhat test