Supercharge `klint` configuration with `logLevel` option — or similar behavior

[x80486]

I'm using klint for kotlinGradle. I couldn't find how to set the log level in order to figure it out what's causing some changes when auto-formatting.

I guess augmenting BaseKotlinExtension.KtlintConfig with logLevel should do it?

Bonus points for an enum with the log levels — and supporting a string value as well for those who don't want to go back and forth with the imports 😅