custom field currency with more than one currency [Feature Request]

Description

I have invoices in euros and dollars.
There's a custom currency field, but it only allows you to define one default currency. It would be great if you could define multiple currencies for this field and then select them from a dropdown menu during data entry. The first defined currency should be the default, and the second or third currency should be optionally selectable from the dropdown.

Thank you so much for your work on Paperless NGX!

Other

_No response_