Linting generated code

[vietj]

Currently generated examples are not the most kotlin-ish code.

It seems that https://ktlint.github.io/ provides a way to lint and reformat code.

It would be great to integrate it (if possible) in the code translator to improve the style.

[gmariotti]

pinterest/ktlint#313 is potentially a blocker. Unless you decide to add the disable rule comment on top of all files.