Move lsp config to local file structure

.config/nvim/lsp/autotools_ls.lua

@@ -0,0 +1,24 @@
+---@brief
+---
+--- https://github.com/Freed-Wu/autotools-language-server
+---
+--- `autotools-language-server` can be installed via `pip`:
+--- ```sh
+--- pip install autotools-language-server
+--- ```
+---
+--- Language server for autoconf, automake and make using tree sitter in python.
+
+local util = require 'lspconfig.util'
+
+local root_files = { 'configure.ac', 'Makefile', 'Makefile.am', '*.mk' }
+
+---@type vim.lsp.Config
+return {
+  cmd = { 'autotools-language-server' },
+  filetypes = { 'config', 'automake', 'make' },
+  root_dir = function(bufnr, on_dir)
+    local fname = vim.api.nvim_buf_get_name(bufnr)
+    on_dir(util.root_pattern(unpack(root_files))(fname))
+  end,
+}