ci: main, dev 브랜치에 push할 때 자동으로 테스트를 수행하는 workflow 추가

#85

.github/workflows/lint_and_test.yml

@@ -0,0 +1,43 @@
+name: Lint and Test
+
+on:
+  push:
+    branches:
+      - main
+      - dev
+  pull_request:
+    branches:
+      - main
+      - dev
+
+jobs:
+  lint-and-test:
+    name: Lint and Test
+    runs-on: ubuntu-latest
+
+    steps:
+      # Checkout the repository
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      # Install pnpm
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 9
+          run_install: true
+
+      # Set up Node.js
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: "pnpm"
+
+      # Run lint
+      - name: Run lint
+        run: pnpm eslint .
+
+      # Run tests
+      - name: Run tests
+        run: pnpm test