Multi-currency support for automatic security deposits (including BRL)

Currently, automatic security deposits only support USD, GBP, and AUD. This prevents hosts using other currencies, such as BRL (Brazilian Real), from using the automatic collection feature without changing their entire property currency.

The request is to expand support for more currencies (specifically BRL) and to implement multi-currency support for security deposits that can be enabled and managed via the Guest Portal. This would allow hosts to collect deposits in the appropriate currency regardless of their base property setting.