add config managment scripts

init.lua

@@ -13,3 +13,6 @@ require('snippet.shorthands')
 for _, file in ipairs(vim.fn.readdir(vim.fn.stdpath('config')..'/lua/snippet', [[v:val =~ '\.lua$']])) do
   require('snippet.'..file:gsub('%.lua$', ''))
 end
+
+-- call the config manager ----------------------------------------------------
+require('mngr')