Add GitHub Actions workflow for testing

.gitea/workflows/test.yaml

@@ -0,0 +1,18 @@
+name: Test Runner
+
+on:
+    push:
+        branches: [main]
+
+jobs:
+    test:
+        runs-on: ubuntu-latest
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v4
+
+            - name: Hello
+              run: |
+                  echo "🎉 Runner 정상 작동!"
+                  echo "Node version: $(node -v)"
+                  npm -v