Custom Currency

[heraju]

Firstly, I did check the implementation logic and understood there is no implementation of a custom currency, Correct me if am missing anything I did check on the load currency method, which uses only three config files.

There are cases where we want to give freedom to the user to create their custom currency, where we have control over the currency to be used only in their apps say call it amazon currency, there would be symbols and exponent that they want to customize.

Please share your thoughts, would this be a good addition?