Add Customer call support to Header

Purpose: We need inform customer about customer support phone number since Amber will be starting to handle phone calls.
Design:

https://www.figma.com/proto/6gNNzvKzUwmPjYYgD6NzN1/Appliance.io-POS?page-id=14092%3A95749&node-id=19294-155527&viewport=-10776%2C-4540%2C0.86&t=k7UOWK1hWoO41ovl-1&scaling=scale-down&content-scaling=fixed&starting-point-node-id=19294%3A155527&show-proto-sidebar=1

Action:When clicked it will trigger a call pop-up, allowing users to dial directly.