Idea: pretty-ts-errors integration

[mcchrish]

https://github.com/yoavbls/pretty-ts-errors is a pretty popular VSCode plugin to make TS errors a lot more readable.

One of the most requested feature is integration with other editors like neovim.

Vtsls being a wrapper for the tsserver, I think it's in a good position to integration such feature.

There is a fork to output the diagnostics as markdown, which is already a supported format in latest neovim.

[yioneko]

It seems that the author has plan to implement it as TS plugin: zed-industries/zed#7844 (comment), which is also the correct way for cross-editor support from my personal view. I'm not sure about the quality of that fork, and I think it would be better to wait a bit to see if support from original author could be finally landed.