Create new contact page

[mlqn]

Create a contact page that lists all the ways to contact Altinn Servicedesk.

Here are the sketches from the design team:

https://www.figma.com/file/VAvGOqkMhKM8HL8h4xBeDH7b/Re-design-Altinn-Studio?type=design&node-id=8403%3A24455&mode=design&t=snoGaJ1pNRt6Zz2k-1

This page must be available at root (e.g. https://altinn.studio/contact) which means that a new package must be created.

[nkylstad]

Tested OK!