Create workflow for testing ci

.github/workflows/ci.yml

@@ -0,0 +1,29 @@
+name: ci
+
+on: push
+
+jobs:
+  build:
+    runs-on: macos-latest
+    if: github.repository == 'cheonjaewoong/compose-grid'
+    strategy:
+      matrix:
+        api: [21, 23, 29]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Validate gradle wrapper
+        uses: gradle/wrapper-validation-action@v1
+
+      - name: Setup jdk
+        uses: actions/setup-java@v3
+        with:
+          distribution: "zulu"
+          java-version: 8
+
+      - name: Run UI tests
+        uses: reactivecircus/android-emulator-runner@v2
+        with:
+          api-level: ${{ matrix.api }}
+          script: ./gradlew connectedDebugAndroidTest --stacktrace