Invite user component

[erikguntner]

Overview

Create a component that allows coordinators to invite users through the app. There currently aren't any designs for this screen so this will focus primarily on functionality.

Action Items

• The component contains a text field that accepts an email.
• A button that submits the email
• Validation to check for a valid email and rendering an error message if invalid
• Error handling by displaying an error Alert if the request fails
• Shows a success alert if the request is successful
• Creating a Redux data fetching hook that sends a POST request to the /api/auth/invite route