Move lsp config to local file structure

.config/nvim/lsp/pico8_ls.lua

@@ -0,0 +1,18 @@
+---@brief
+---
+--- https://github.com/japhib/pico8-ls
+---
+--- Full language support for the PICO-8 dialect of Lua.
+
+local util = require 'lspconfig.util'
+
+---@type vim.lsp.Config
+return {
+  cmd = { 'pico8-ls', '--stdio' },
+  filetypes = { 'p8' },
+  root_dir = function(bufnr, on_dir)
+    local fname = vim.api.nvim_buf_get_name(bufnr)
+    on_dir(util.root_pattern('*.p8')(fname))
+  end,
+  settings = {},
+}