Illustrate multiple users vs username aliases in config.nix

[cameronraysmith]

Following up on #93 and the sentiment behind srid/nixos-config#66 (comment) update

nixos-unified-template/modules/flake/config.nix

Lines 4 to 10 in f5c0fc9

	{
	me = {
	username = "runner";
	fullname = "John Doe";
	email = "johndoe@example.com";
	};
	}

to

 { 
   me = { 
     username = "runner"; 
     fullname = "John Doe"; 
     email = "johndoe@example.com"; 
   }; 
   you = { 
     username = "gunner"; 
     fullname = "Ron Poe"; 
     email = "ronpoe@example.com"; 
   };
 } 

and illustrate the distinct home manager configuration for you. It may also be valuable to illustrate the scenario essentially treating the two usernames as aliases with home manager configurations that are equivalent apart from the username, such as

rec { 
   me = { 
     username = "johndoe"; 
     fullname = "John Doe"; 
     email = "johndoe@example.com"; 
   }; 
   meInGha = me // { 
     username = "runner"; 
   }; 
 }