Refine plugin configurations for Trouble and Lazy UI

Updates `trouble.nvim` settings, including a more detailed icon configuration.
Comments out `which-key` registration for `trouble` and `goto` commands.
Adds a 'git' icon to the `lazy.nvim` interface.
Localizes `vim` global in `init.lua`.

init.lua

@@ -83,7 +83,8 @@ I hope you enjoy your Neovim journey,
 
 P.S. You can delete this when you're done too. It's your config now! :)
 --]]
-
+--
+local vim = vim
 -- Set <space> as the leader key
 -- See `:help mapleader`
 --  NOTE: Must happen before plugins are loaded (otherwise wrong leader will be used)
@@ -1030,6 +1031,7 @@ require('lazy').setup({
       start = '🚀',
       task = '📌',
       lazy = '💤 ',
+      git = 'g',
     },
   },
 })