Update profile details

Would be nice to have a settings icon on the authenticated user's profile screen (`AuthProfileScreen`) that opens a modal screen with a form of sorts that allows you to update settings in your profile such as:

* Profile Image (select from the photo library + take photo (if that's not too complicated) - _we can have a separate ticket for this because I'm not sure if the API makes this easy)_
* Name
* Email
* Website

We may also want to allow updating of the following:

* Bio
* Company
* Toronto

But we can do this as part of a separate ticket and only if we decide to include them in the user profile screen