Move lsp config to local file structure

.config/nvim/lsp/smarty_ls.lua

@@ -0,0 +1,36 @@
+---@brief
+---
+--- https://github.com/landeaux/vscode-smarty-langserver-extracted
+---
+--- Language server for Smarty.
+---
+--- `smarty-language-server` can be installed via `npm`:
+---
+--- ```sh
+--- npm i -g vscode-smarty-langserver-extracted
+--- ```
+
+---@type vim.lsp.Config
+return {
+  cmd = { 'smarty-language-server', '--stdio' },
+  filetypes = { 'smarty' },
+  root_dir = function(bufnr, on_dir)
+    local fname = vim.api.nvim_buf_get_name(bufnr)
+    local cwd = assert(vim.uv.cwd())
+    local root = vim.fs.root(fname, { 'composer.json', '.git' })
+
+    -- prefer cwd if root is a descendant
+    on_dir(root and vim.fs.relpath(cwd, root) and cwd)
+  end,
+  settings = {
+    smarty = {
+      pluginDirs = {},
+    },
+    css = {
+      validate = true,
+    },
+  },
+  init_options = {
+    storageDir = vim.NIL,
+  },
+}