Added the following PlaceholderAPI placeholders:

• %theosiseconomy_richest_<position>_name%
• %theosiseconomy_richest_<position>_balance%
• %theosiseconomy_richest_<position>_balance_formatted%

<position> represents a position from richest to poorest, i.e. 1 represents the richest player, 2 represents the second-richest player, and so on...