Big changes came in this version.
1- The coin manager was reserved only for the superadmin.
2- A tool was added to manage exchange rates with respect to the system's base currency.
2.1- Exchange rates were separated by business.
3- Unnecessary permissions are removed and only view, edit, create, delete are left.
4- Language packs [ar, ce, de, hi] are added.
5- Several bugs were corrected.
6- Existing language packs were completed.
