test: add hardhat ci

.github/workflows/hardhat.yml

@@ -0,0 +1,34 @@
+name: Hardhat
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  yarn-test:
+    strategy:
+      fail-fast: true
+
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: recursive
+
+      - name: Install node
+        uses: actions/setup-node@v3
+        with:
+          node-version: 18
+          cache: yarn
+
+      - name: Install dependencies
+        run: yarn install --frozen-lockfile
+
+      - name: Install Foundry
+        uses: foundry-rs/foundry-toolchain@v1
+
+      - name: Run Hardhat tests
+        run: yarn test