Migrate to @github/copilot-language-server

[TerminalFi]

Github now publishes it's language server on npmjs https://www.npmjs.com/package/@github/copilot-language-server/v/1.263.0?activeTab=code

It differs from that in copilot.vim and contains more capbilities

[TerminalFi]

#236

[GottemHams]

Would that also solve the problem that more often than not, Copilot just outright won't suggest anything at all? I've been trying for well over 15 minutes to get it to translate one simple string, but it doesn't even try to suggest something (using phantom mode by the way). I see the working indicator for a millisecond or so, then it quickly disappears and nothing gets suggested.

[TerminalFi]

@GottemHams i suggest you view the LSP logs to see what the response from the server is. That will help diagnose the problem.