Move general settings and plugins out of init.vim

nvim/coc.vim

@@ -61,3 +61,14 @@ let g:coc_global_extensions = [
 inoremap <expr> <cr> pumvisible() ? "\<C-y>" : "\<C-g>u\<CR>"
 
 command! -nargs=0 Prettier :CocCommand prettier.formatFile
+
+" Use K to show documentation in preview window
+nnoremap <silent> K :call <SID>show_documentation()<CR>
+
+function! s:show_documentation()
+  if (index(['vim','help'], &filetype) >= 0)
+    execute 'h '.expand('<cword>')
+  else
+    call CocAction('doHover')
+  endif
+endfunction