Add staff with roles and permissions

Create cashier, counter manager, buyer and owner roles and limit what each can see.

1. 1

   Review default roles

   Admin and Cashier exist by default.

2. 2

   Create roles

   For example Counter manager, Buyer.

3. 3

   Tick permissions

   Hide purchase prices from cashiers, allow refunds only for managers.

4. 4

   Add users

   Each person gets their own login, role and language.

5. 5

   Limit locations

   Restrict staff to the branches they work at.