[Feature request] Support more LSP highlights about base16-vim

[fnune]

Whenever I find some time I'll give this a go

[GordianDziwis]

I defined in #19:

" Standard highlights to be used by plugins
call <sid>hi("GitAddSign",           s:gui0B, "", s:cterm0B, "", "", "")
call <sid>hi("GitChangeSign",        s:gui04, "", s:cterm04, "", "", "")
call <sid>hi("GitDeleteSign",        s:gui08, "", s:cterm08, "", "", "")
call <sid>hi("GitChangeDeleteSign",  s:gui04, "", s:cterm04, "", "", "")

call <sid>hi("ErrorSign",    s:gui08, "", s:cterm08, "", "", "")
call <sid>hi("WarningSign",  s:gui09, "", s:cterm09, "", "", "")
call <sid>hi("InfoSign",     s:gui0D, "", s:cterm0D, "", "", "")
call <sid>hi("HintSign",     s:gui0C, "", s:cterm0C, "", "", "")

call <sid>hi("ErrorFloat",   s:gui08, s:gui02, s:cterm08, s:cterm02, "", "")
call <sid>hi("WarningFloat", s:gui09, s:gui02, s:cterm09, s:cterm02, "", "")
call <sid>hi("InfoFloat",    s:gui0D, s:gui02, s:cterm0D, s:cterm02, "", "")
call <sid>hi("HintFloat",    s:gui0C, s:gui02, s:cterm0C, s:cterm02, "", "")

call <sid>hi("ErrorHighlight",   "", "", s:cterm00, s:cterm08, "underline", s:gui08)
call <sid>hi("WarningHighlight", "", "", s:cterm00, s:cterm09, "underline", s:gui09)
call <sid>hi("InfoHighlight",    "", "", s:cterm00, s:cterm0D, "underline", s:gui0D)
call <sid>hi("HintHighlight",    "", "", s:cterm00, s:cterm0C, "underline", s:gui0C)

call <sid>hi("SpellBad",     "", "", s:cterm00, s:cterm08, "undercurl", s:gui08)
call <sid>hi("SpellLocal",   "", "", s:cterm00, s:cterm0C, "undercurl", s:gui0C)
call <sid>hi("SpellCap",     "", "", s:cterm00, s:cterm0D, "undercurl", s:gui0D)
call <sid>hi("SpellRare",    "", "", s:cterm00, s:cterm0E, "undercurl", s:gui0E)

When it gets merged, I link the highlights to the LSPDiagnostic ones.

[fnune]

Can be closed when we merge that one, then! Thanks!