Add post-email verification view

[juancwu]

Description

Add a view for the different states after a user clicks on the link to verify their email. This view has three different modes:

1. Success
2. Failure
3. Internal Error

The view has also been added to the route handler so that it renders the view instead of responding with a JSON.

Linked Issues

• Closes [BE Feat] Create verification email redirect views #213

Testing

• Tests for the /api/v1/auth/verify-email route in tests/server_test.go have been updated to expect the route to render the view instead of JSON response.

Screenshots

Checklist

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[AmirAgassi]

lgtm