Check formatting of kotlin files in CI

.github/workflows/ci.yml

@@ -34,6 +34,9 @@ jobs:
           path: ~/.gradle/caches
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
           restore-keys: ${{ runner.os }}-gradle
+          
+      - name: Check if kotlin files are formatted correctly
+        run: ./gradlew runKtlint
 
       - name: Build debug APK and run jvm tests
         run: ./gradlew assembleDebug lintDebug testDebugUnitTest --stacktrace