chore: add unit test workflow configuration (#102)

Author: floydkim

.github/workflows/unit-test.yml

@@ -0,0 +1,24 @@
+name: Unit Test
+
+on:
+  push:
+    branches:
+      - '**'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 18
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run Jest
+        run: npm run jest