Team detail - add roles

[Nanciee]

AC:

• create a floating add button on the team detail page
• when clicking on the add button the add roles modal will appear
• clicking on the submit button will add a new role

NOTE: We don't need to building out "Days of Week" and "Start/End Time" sections of the form at this point.

[Nanciee]

[Nanciee]

[Nanciee]

This ticket is 90% done. It is only missing the integration part with the create role api. It is currently blocked by #122, #123, and #124