Add coc plugins to Neovim && add coc enter

.config/nvim/init.vim

@@ -16,3 +16,18 @@ set scrolloff=10
 tnoremap <Esc> <C-\><C-n>
 command TMK w | call system("latexmk -pdf && latexmk -c")
 
+inoremap <silent><expr> <cr> pumvisible() ? coc#_select_confirm()
+    \: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"
+
+" coc.nvim Plugins
+let g:coc_global_extensions = [
+    \'coc-pairs',
+    \'coc-json',
+    \'coc-pyright',
+    \'coc-go',
+    \'coc-rust-analyzer',
+    \'coc-clangd',
+    \'coc-html',
+    \'coc-css',
+    \'coc-tsserver'
+\]