refactored plugins and configurations

lua/plugins/neotest.lua

@@ -1,6 +1,13 @@
+-- Neotest: test runner with Go and Python adapters.
+-- Loads on go/python filetypes, or when require("neotest") is called from a
+-- keymap (config.keymap wraps the bindings in `function() require(...) end`
+-- precisely so the lazy-load can happen.
+
 return {
   {
     "nvim-neotest/neotest",
+    lazy = true,
+    ft = { "go", "ptyhon" },
     dependencies = {
       "nvim-neotest/nvim-nio",
       "nvim-lua/plenary.nvim",