Generator output

The output of the generator is a legitimate Gradle project:
```
openapi/
└── petstore
    ├── README.md
    ├── build.gradle
    ├── docs
    ├── settings.gradle
    └── src
```
If I integrate the generator into the project as a Gradle Plugin, I would expect that only the absolute minimum will be generated, ie. sources only (`src` folder).