Add coc-clangd to CoC

.vimrc

@@ -1032,7 +1032,7 @@ nnoremap <silent> <leader>p  :<C-u>CocListResume<CR>
 
 
 " Rust Coc needs
-" :CocInstall coc-rust-analyzer coc-spell-checker coc-cspell-dicts coc-json coc-markdownlint coc-yaml coc-pyright coc-vimtex
+" :CocInstall coc-rust-analyzer coc-spell-checker coc-cspell-dicts coc-json coc-markdownlint coc-yaml coc-pyright coc-vimtex coc-clangd
 "
 " For text linting to work via coc-diagnostic, install
 " yay -S languagetool alex proselint write-good
@@ -1047,6 +1047,7 @@ let g:coc_global_extensions = [
             \'coc-spell-checker',
             \'coc-ltex',
             \'coc-cspell-dicts',
+            \'coc-clangd',
             \'coc-vimtex']
 
 " Coc END