feature: add currency setting for admin panel

[diepdo1810]

BUGS:
N/A

Please describe the issue that you solved if it's not filed.

Otherwise please mention issue #id and use a comma if your PR
solves multiple issues.

For things other than bugs:
Add a new setting for configuring the currency used in the admin panel. This feature allows administrators to set and manage the currency for transactions directly from the settings page.

Describe that thing in a very short line, the word limit is 200.
Otherwise use issue #id if the issue was filed as feature request.

CAPTURE: