Respect MarkupKind client capability

[maximbaz]

A client can send a MarkupKind[] capability for completion, signatureHelp and hover (search for MarkupKind[] string here), but as far as I can tell the current code ignores this and always responds with a "markdown".

https://github.com/mads-hartmann/bash-language-server/blob/ce72fbbba968c02ec4bf99673c160bb859c59527/server/src/server.ts#L138-L143

[skovhus]

@maximbaz good idea. Are you up for creating a PR for this? :)

[maximbaz]

Not right now, to be honest I still haven't started to extensively use this project yet, not enough time and idank/explainshell#125 is still not merged 😞

[skovhus]

Closing this due to inactivity.