Configurable language server close timeout

[snosratiershad]

I want to increase close language server timeout to prevent force shutdown with Timed out waiting for language servers to shutdown error message.
I found that there is a static 3000ms timeout in code (helix-view/src/editor.rs:2023). I think the best approach is to use specific timeout for each language-server but also a general configurable timeout is better.

[ArmanSoltani]

I can take this one if nobody is working on it.

[ArmanSoltani]

I agree with you that a per language-server close_timeout config makes more sense given that it should only be needed to increase the default one for very slow language-server. Also, it makes sense to me to put that config in the [language-server.mylang] group.

@snosratiershad just out of curiosity do you encounter that timeout for a specific language-server or for all of them in you machine?

[snosratiershad]

@ArmanSoltani for specific language servers

[the-mikedavis]

See #5266