Update language.yml

Commit 1/2.

Expanded language.yml to include formats and styles for three main attributes:
%i : the 'custom' name for an item
%I : the 'original' name (or item type)
%e : an enchantment indicator

Wherever these three % are placed in this file, the messages in console and game use the definitions from -format and -style.

It makes the code slightly less clear, but more customisable. The other option was to hard code these formats, but at least this way you can still structure auction-info-suppressed-alt how you like.