Coach Search API

[ddugovic]

I'd like my Discord bot to be able to print a coaches list similar to https://lichess.org/coach/en-US/all/login , https://lichess.org/coach/de-DE/all/login , etc.

Personally I don't have a need to search for a coach in multiple languages, but it wouldn't surprise me if some multi-lingual student might have such a need.