BundleLauncher moved to gradle script

.github/workflows/push.yml

@@ -25,9 +25,9 @@ jobs:
       if: ${{ github.repository == 'Anuken/Mindustry' }}
       run: |
         ./gradlew updateBundles
+
         git diff --exit-code
-        if [ $? ];
-        then
+        if [ $? ]; then
           git add core/assets/bundles/*
           git commit -m "Automatic bundle update"
           git push