Move lsp config to local file structure

.config/nvim/lsp/djlsp.lua

@@ -0,0 +1,13 @@
+---@brief
+---
+--- https://github.com/fourdigits/django-template-lsp
+---
+--- `djlsp`, a language server for Django templates.
+
+---@type vim.lsp.Config
+return {
+  cmd = { 'djlsp' },
+  filetypes = { 'html', 'htmldjango' },
+  root_markers = { '.git' },
+  settings = {},
+}