Move lsp config to local file structure

.config/nvim/lsp/ntt.lua

@@ -0,0 +1,20 @@
+---@brief
+---
+--- https://github.com/nokia/ntt
+--- Installation instructions can be found [here](https://github.com/nokia/ntt#Install).
+--- Can be configured by passing a "settings" object to vim.lsp.config('ntt'):
+--- ```lua
+--- vim.lsp.config('ntt', {
+---     settings = {
+---       ntt = {
+---       }
+---     }
+--- })
+--- ```
+
+---@type vim.lsp.Config
+return {
+  cmd = { 'ntt', 'langserver' },
+  filetypes = { 'ttcn' },
+  root_markers = { '.git' },
+}