Add our brand fonts to the app

[shawnborton]

We need to add our brand fonts to the app:

• GT America Exp Regular
• GT America Exp Medium
• GT America Exp Bold

[shawnborton]

@AndrewGable or @tgolen could you help me out with this? You can see how our contractor implemented this here: https://github.com/Expensify/React-Native/blob/effcbf4b7aa9ea00d33bb5a888556b5f17b3787c/js/components/Typography/index.js

[quinthar]

This feels like a thing we really want to prove we can solve out of the gate. However, I'm not convinced the company is eagle-eyed enough to notice this if it slips; marking HIGH.

[shawnborton]

Unassigning myself as I need someone to help me with the JS portion of this.

[tgolen]

I think this is done 👍