Support for Eglot

[jojojames]

Might be cool to decouple dap-mode from lsp-mode and support https://github.com/joaotavora/eglot too!

Thanks for the package. :)

[yyoncho]

I will keep that in mind. Eglot does not work with Java JDT LS server so at this point there is no way to test it.

[yveszoundi]

It looks like Eglot now supports the Java JDT LS server, likely less options than lsp-java but maybe dap-mode could work with it.

[yyoncho]

@yveszoundi Given the fact I was promoted to member in lsp-mode, the fact that lsp-mode was redesigned and it now supports most(if not all) features of eglot out of the box(https://github.com/emacs-lsp/lsp-mode#whats-new-in-lspel) and much more, the fact that eglot is not interested in supporting extension methods brings this PR closer to rejecting or at least not addressing it in near future.

[yveszoundi]

Thanks @yyoncho, fair enough.

[yyoncho]

Closing as won't fix considering the amount of work in lsp-mode/dap-mode repo and the overhead that solving this PR will introduce.