Move lsp config to local file structure

.config/nvim/lsp/ungrammar_languageserver.lua

@@ -0,0 +1,26 @@
+---@brief
+---
+--- https://github.com/binhtran432k/ungrammar-language-features
+--- Language Server for Ungrammar.
+---
+--- Ungrammar Language Server can be installed via npm:
+--- ```sh
+--- npm i ungrammar-languageserver -g
+--- ```
+
+---@type vim.lsp.Config
+return {
+  cmd = { 'ungrammar-languageserver', '--stdio' },
+  filetypes = { 'ungrammar' },
+  root_markers = { '.git' },
+  settings = {
+    ungrammar = {
+      validate = {
+        enable = true,
+      },
+      format = {
+        enable = true,
+      },
+    },
+  },
+}