Make LSP settings more easily configurable

[ancientstraits]

Instead of having to add a new block every time someone wants to configure an additional language server, this PR looks for LSP settings files for each language server and adds their settings to opts if they exist.

[Syakhisk]

I was about to make a PR exactly like this, you beat me to it!

+1

[Rishabh672003]

thank you, i have included this in my pr also #53