Add vim9 lsp semantic highlights

[jclsn]

Adds more vim9 lsp highlights. I chose a different color for structs/classes than primitive types and changed the StorageClass to SpaceduckPink (was still unused), so it is not he same color as the classes. Looks very nice imo

[jclsn]

@jinh0 @pineapplegiant Hi, can you merge this one? Would also be nice to update main at some point

[pineapplegiant]

I'll test and merge tomorrow

[jclsn]

Here is an example config for the vim9 lsp using vim-plug

set encoding=utf-8
set nocompatible
colorscheme spaceduck

call plug#begin('$MYVIMDIR/plugged')
     Plug 'yegappan/lsp'
     Plug 'pineapplegiant/spaceduck'
call plug#end()

let lspOpts = #{
        \   aleSupport: v:false,
        \   autoComplete: v:true,
        \   autoHighlight: v:false,
        \   autoHighlightDiags: v:true,
        \   autoPopulateDiags: v:false,
        \   completionMatcher: 'case',
        \   completionMatcherValue: 1,
        \   diagSignErrorText: '❗',
        \   diagSignHintText: '💡',
        \   diagSignInfoText: '💡',
        \   diagSignWarningText: '💡',
        \   diagSignPriority: {
        \       'Error': 100,
        \       'Warning': 99,
        \       'Information': 98,
        \       'Hint': 97
        \   },
        \   echoSignature: v:false,
        \   hideDisabledCodeActions: v:false,
        \   highlightDiagInline: v:true,
        \   hoverInPreview: v:false,
        \   ignoreMissingServer: v:false,
        \   keepFocusInDiags: v:true,
        \   keepFocusInReferences: v:true,
        \   completionTextEdit: v:true,
        \   diagVirtualTextAlign: 'above',
        \   diagVirtualTextWrap: 'default',
        \   noNewlineInCompletion: v:false,
        \   omniComplete: v:null,
        \   omniCompleteAllowBare: v:false,
        \   outlineOnRight: v:false,
        \   outlineWinSize: 20,
        \   popupBorder: v:true,
        \   popupBorderHighlight: 'Title',
        \   popupBorderHighlightPeek: 'Special',
        \   popupBorderSignatureHelp: v:false,
        \   popupHighlightSignatureHelp: 'Pmenu',
        \   popupHighlight: 'Normal',
        \   semanticHighlight: v:true,
        \   showDiagInBalloon: v:true,
        \   showDiagInPopup: v:true,
        \   showDiagOnStatusLine: v:false,
        \   showDiagWithSign: v:true,
        \   showDiagWithVirtualText: v:false,
        \   showInlayHints: v:false,
        \   showSignature: v:true,
        \   snippetSupport: v:false,
        \   ultisnipsSupport: v:false,
        \   useBufferCompletion: v:false,
        \   usePopupInCodeAction: v:false,
        \   useQuickfixForLocations: v:false,
        \   vsnipSupport: v:false,
        \   bufferCompletionTimeout: 100,
        \   customCompletionKinds: v:false,
        \   completionKinds: {},
        \   filterCompletionDuplicates: v:false,
        \   condensedCompletionMenu: v:false,
	\ }
autocmd User LspSetup call LspOptionsSet(lspOpts)

let lspServers = [#{name: 'clangd',
			\  filetype: ['c', 'cpp'],
			\  path: 'clangd',
			\  args: [
			\		'--background-index',
			\		'--clang-tidy',
			\		'--completion-style=detailed'
			\  ]
			\ }]

autocmd User LspSetup call LspAddServer(lspServers)

nnoremap <leader>ac :LspCodeAction<CR>
nnoremap <silent> <leader>pe :LspDiagPrev<CR>
nnoremap <silent> <leader>ne :LspDiagNext<CR>
nnoremap <silent> <leader>pd :LspPeekDefinition<CR>
nnoremap <silent> <leader>pdc :LspPeekDeclaration<CR>
nnoremap <silent> <leader>pr :LspPeekReferences<CR>
nnoremap <silent> <leader>ol :LspOutline<CR>
nnoremap <silent> <leader>rn :LspRename<CR>
nnoremap <leader>cl :LspCodeLens<CR>

function! s:SmartHover() abort
	let result = execute('LspHover')
	if result =~ 'Error'
		call feedkeys('K', 'n')
	endif
endfunction

nnoremap <silent> K :call <SID>SmartHover()<CR>

nnoremap <silent> gd :LspGotoDefinition<CR>
nnoremap <silent> gy :LspGotoTypeDef<CR>
nnoremap <silent> gi :LspGotoImpl<CR>
nnoremap <silent> gdc :LspGotoDeclaration<CR>

command! -nargs=0 -bar -range=% Format <line1>,<line2>LspFormat
set formatexpr=lsp#lsp#FormatExpr() " Map LspFormat to the gq command