add more lsp servers for nvim

nvim/lua/settings/lsp_config/cssls.lua

@@ -0,0 +1,43 @@
+local util = require 'lspconfig.util'
+
+local bin_name = 'vscode-css-language-server'
+local cmd = { bin_name, '--stdio' }
+
+if vim.fn.has 'win32' == 1 then
+  cmd = { 'cmd.exe', '/C', bin_name, '--stdio' }
+end
+
+return {
+  default_config = {
+    cmd = cmd,
+    filetypes = { 'css', 'scss', 'less' },
+    root_dir = util.root_pattern('package.json', '.git'),
+    single_file_support = true,
+    settings = {
+      css = { validate = true },
+      scss = { validate = true },
+      less = { validate = true },
+    },
+  },
+  docs = {
+    description = [[
+https://github.com/hrsh7th/vscode-langservers-extracted
+`css-languageserver` can be installed via `npm`:
+```sh
+npm i -g vscode-langservers-extracted
+```
+Neovim does not currently include built-in snippets. `vscode-css-language-server` only provides completions when snippet support is enabled. To enable completion, install a snippet plugin and add the following override to your language client capabilities during setup.
+```lua
+--Enable (broadcasting) snippet capability for completion
+local capabilities = vim.lsp.protocol.make_client_capabilities()
+capabilities.textDocument.completion.completionItem.snippetSupport = true
+require'lspconfig'.cssls.setup {
+  capabilities = capabilities,
+}
+```
+]],
+    default_config = {
+      root_dir = [[root_pattern("package.json", ".git") or bufdir]],
+    },
+  },
+}