Move lsp config to local file structure

.config/nvim/lsp/luau_lsp.lua

@@ -0,0 +1,20 @@
+---@brief
+---
+--- https://github.com/JohnnyMorganz/luau-lsp
+---
+--- Language server for the [Luau](https://luau-lang.org/) language.
+---
+--- `luau-lsp` can be installed by downloading one of the release assets available at https://github.com/JohnnyMorganz/luau-lsp.
+---
+--- You might also have to set up automatic filetype detection for Luau files, for example like so:
+---
+--- ```vim
+--- autocmd BufRead,BufNewFile *.luau setf luau
+--- ```
+
+---@type vim.lsp.Config
+return {
+  cmd = { 'luau-lsp', 'lsp' },
+  filetypes = { 'luau' },
+  root_markers = { '.git' },
+}