- Expanded output from guest info api endpoint
- Share guest info between both routes under /sponsor of the frontend.
- More localised text options added for use on the sponsor pages
- Details button on the sponsor overview page now points to the guest
  info page for each person.

Resolves: GREG-74

Refactor register summary step

See merge request !109

Improving testcase

See merge request !111

Add some OIDC flow tests.

See merge request !106

Enable testing for gregui

Fixing broken test

See merge request !108

Fix handling of private email and mobile for the invitation endpoints

See merge request !107

GREG-82: Style tabs

See merge request !103

Tests/add gregui

See merge request !105

Remove trailing slash from api paths

See merge request !102

Remove the 'email' and 'mobile_phone' fields on Person ...

See merge request !104

A proxy refused to include trailing slashes, and so they have been
removed.

Resolves: GREG-76

Remove the 'email' and 'mobile_phone' fields on Person and use identities to represent this data instead.

- Migrate data on existing Person objects to Identity objects
- Make the 'is verified' logic only accept certain ID types
- Sync the Person.is_verified and API 'verified' filter logic