[Feature]: Currency exchange

[L9Tigrotto]

Description

implement a currency exchange system that automatically escalates to higher tier currencies when costs exceed the specified limit.

the idea is: when the cost of an item exceeds the maximum limit for the current currency, the system should automatically request the next currency in the hierarchy.

Describe the solution you would like

example settings: max_cost: 16 currencies: [ iron, ender_pearl, diamond ]

if travel costs ≤ 16 iron: request payment in iron, with travel costs > 16 iron: request payment in ender_pearl and when travel costs > 16 ender_pearl: request payment in diamond

Anything else?

No response