Move lsp config to local file structure

.config/nvim/lsp/mdx_analyzer.lua

@@ -0,0 +1,22 @@
+---@brief
+--- https://github.com/mdx-js/mdx-analyzer
+---
+--- `mdx-analyzer`, a language server for MDX
+
+local util = require 'lspconfig.util'
+
+---@type vim.lsp.Config
+return {
+  cmd = { 'mdx-language-server', '--stdio' },
+  filetypes = { 'mdx' },
+  root_markers = { 'package.json' },
+  settings = {},
+  init_options = {
+    typescript = {},
+  },
+  before_init = function(_, config)
+    if config.init_options and config.init_options.typescript and not config.init_options.typescript.tsdk then
+      config.init_options.typescript.tsdk = util.get_typescript_server_path(config.root_dir)
+    end
+  end,
+}