[POS UI EXTENSIONS] Add autoFocus on InputField

[jvmaia]

Please list the related package(s)

• pos-ui-extensions

If this related to specific APIs or components, please list them here

• https://github.com/Shopify/ui-extensions/blob/unstable/packages/ui-extensions/src/surfaces/point-of-sale/components/shared/InputField.ts

Describe the changes you are looking for

We should be able to set autoFocus on InputField opening the keyboard automatically.

[cupnoodle]

Any news on this?