refactor: move mapleader to options. no longer needed to be set in init

lua/lazyvim/config/options.lua

@@ -1,5 +1,8 @@
 -- This file is automatically loaded by plugins.config
 
+vim.g.mapleader = " "
+vim.g.maplocalleader = " "
+
 vim.opt.autowrite = true -- enable auto write
 vim.opt.clipboard = "unnamedplus" -- sync with system clipboard
 vim.opt.cmdheight = 1