fix: Allow people to still override ALL the mappings

lua/telescope/config.lua

@@ -77,6 +77,7 @@ function config.set_defaults(defaults)
   --            ...,
   --
   set("mappings", {})
+  set("default_mappings", nil)
 
   -- NOT STABLE. DO NOT USE
   set("horizontal_config", {

lua/telescope/mappings.lua

@@ -2,10 +2,11 @@
 local a = vim.api
 
 local actions = require('telescope.actions')
+local config = require('telescope.config')
 
 local mappings = {}
 
-mappings.default_mappings = {
+mappings.default_mappings = config.values.default_mappings or {
     i = {
       ["<C-n>"] = actions.move_selection_next,
       ["<C-p>"] = actions.move_selection_previous,