After the user verified their email address, show the link for creating Sponsorship Profile
Depends on #10

Tasks:

• Show the link to fill in the Sponsorship Profile only after the account has been verified
• Create a form asking them to fill in their Sponsorship Profile
• When the form is saved, a new Sponsorship Profile instance should be created and associated with the currently logged in user
• Set the form application status to pending
• a user can be both volunteer and sponsor, they should be able to see both sponsorship and volunteer profile if this is the case

Unit tests:

• assert that the SponsorshipProfile instance was created with status "pending" after the form was saved
• assert that a user can be both volunteer and sponsor without issue