chore: Github Actions(PR Test) 추가

.github/workflows/pr-test.yml

@@ -0,0 +1,22 @@
+name: PR Test
+
+on:
+  pull_request:
+    branches: [ master, develop ] 
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - name: Install dependencies
+        run: yarn install
+
+      - name: Run tests
+        run: yarn test