Move lsp config to local file structure

.config/nvim/lsp/phptools.lua

@@ -0,0 +1,36 @@
+---@brief
+---
+--- https://www.devsense.com/
+---
+--- `devsense-php-ls` can be installed via `npm`:
+--- ```sh
+--- npm install -g devsense-php-ls
+--- ```
+---
+--- ```lua
+--- -- See https://www.npmjs.com/package/devsense-php-ls
+--- init_options = {
+--- }
+--- -- See https://docs.devsense.com/vscode/configuration/
+--- settings = {
+---   php = {
+---   };
+--- }
+--- ```
+
+---@type vim.lsp.Config
+return {
+  cmd = { 'devsense-php-ls', '--stdio' },
+  filetypes = { 'php' },
+  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,
+  init_options = {
+    ['0'] = '{}', --optional premium license validation from https://www.devsense.com/purchase/validation
+  },
+}