example(expo): Expo Family Shopping List Demo

[msfstef]

Including all of the Expo family shopping list project.

Features:

• Auth (signup/login/logout - no verification and forgot password yet)
• Create and edit shopping lists
• Create shopping list items
• Tick and untick shopping list items
• Invite people to your family
• Rename people in your families including yourself
• Kick people out of a family including yourself
• Share shopping lists with a family
• Upload images to shopping list items, families, and members (as base64)