Add a log out button to the chrome extension

**Is your feature request related to a problem? Please describe.**
Currently, there is no option for a user of the Chrome extension to log out.

**Describe the solution you'd like**
The user should have the option to log out.

**Describe alternatives you've considered**
This could be a button that the user clicks.

**Additional context**
Add any other context or screenshots about the feature request here.

Start by locating the Chrome extension's user interface and authentication or session-handling entry points. Determine where a logout control belongs and how logout is represented; the work is done when users can select it and are logged out consistently.

Written by the indexing model from the issue text.