The user is able to add their medical record contacts (doctors, family, friends...) in the Settings tab by scanning their QR code shown on the Shared Records screen.
The Shared records screen action 'Receive Records from Others' does what it's supposed to now. It generates a QR with the user public key and basic information like email address, nickname and avatar, which is collected during login to to My Coral Patient.
This PR introduces the concept of contacts.