D23193: Add support for Belarusian currency

[Shubham]

shubham added a reviewer: broulik.

REPOSITORY
  R292 KUnitConversion

REVISION DETAIL
  https://phabricator.kde.org/D23193

To: shubham, #frameworks, ngraham, broulik
Cc: #frameworks, kde-frameworks-devel, LeGast00n, GB_2, michaelh, ngraham, bruns