Initial support for kotlin

[knobo]

[knobo]

I don't know it this is good enough to merge. I will anyway work some more on this.

[ubolonton]

Can you add a Kotlin file with example code? I think examples/hl.kt might be a good name. We don't have automated highlighting tests at the moment, but such a file would still be useful for "look-n-feel tours". (We can add examples for other languages later on.)

[knobo]

Example file, like this: examples/hl.kt

[knobo]

Should I do something more with this?

[meain]

I was trying it out locally and looks like there is some issues with the highlight queries. I am not entirely sure as to what is going on. This theme only highlights function names and strings.

Built-in	Tree-sitter

[jcs090218]

Kotlin is added in #212. Feel free to open PRs for improvements!