fix(config/lua): Generate the 'keymappings' table under 'std'

config/lua/init.lua

@@ -1,5 +1,8 @@
+-- create the required tables under `std`
+trinitrix.std = {keymaps = {}};
+
 --- Add a new keymap. This is just a convenience function which registers the function
--- and at the same time deals with the fact that the whole trinitrix api is async.
+--- and at the same time deals with the fact that the whole trinitrix api is async.
 ---@param mode string
 ---@param key string
 ---@param callback function