BO14 - Create a page to modify a team member

[gregoriopalama]

Create a page that will be opened by clicking on the "edit" button in the team members' list page.

The page should be allowed to Devfest Organizers only and should allow the editing of the informations for the member, as shown below:

The breadcrumb should allow to navigate back to the list page.
Only the name is strictly required. All the other fields are not.
The "Cancel" button will navigate back to the list, the "Save" button will perform the call to the Team API and navigate back to the list, showing a toast that will confirm that the member has been updated. Any error from the API should be notified using a red toast.

Depends on #174 and #177.