Chat backup - first part

[stefanceriu]

This PR implements the screens and mocked logic for:

• enabling/disabling key backup
• generating, changing and verifying a recovery key
• showing badges on the user avatar, settings option, settings screen chat backup and recovery section

The logic inside the SecureBackupController is currently mocked and goes like this:

• backup enabled by default -> disable -> enable -> repeat
• recovery disabled by default -> enable -> change -> fix -> change -> fix etc.

Designs here https://www.figma.com/file/0MMNu7cTOzLOlWb7ctTkv3/Element-X?type=design&node-id=12124-116601&mode=design&t=RLlU4wtjLjUt2xrO-0

Touches:
#1899
#1900
#1901
#1901

[github-actions]

	Warnings
⚠️	This pull request seems relatively large. Please consider splitting it into multiple smaller ones.
⚠️	Please add a changelog.
⚠️	Some of the commits are missing ticket numbers. Please consider squashing all commits that don't have a tracking number.
⚠️	You seem to have made changes to views. Please consider adding screenshots.

Generated by 🚫 Danger Swift against 6e26202

[pixlwave]

Woah, great work!

[pixlwave]

LGTM, (plus the changes we went over this morning).

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
10 Code Smells

No Coverage information
0.0% Duplication

[callumu]

Some UI comments:

• Red dot on avatar - could this be 8x8 and with a 2px border between it and the avatar photo?
• What colour is the key icon on the Chat backup menu? Could it be made consistent with the rest?
• Learn more link - can this take the user to the section of the page where the title is 'What is Key Backup?'
• Large key icon at the top of the screen - can this colour be changed to the color/icon/primary
• Set up recovery screen - updated supporting copy
• Recovery key UI - can the background be added behind 'Generate your recovery key' and the recovery key? Can the height of the box stay the same before and after the key has been generated? This is the same feedback for the 'Change recovery key?' page
• Tap to copy recovery key - can the entire box be made tappable, not just the icon?
• Save recovery key button - can this be the secondary colour? It should also be spaced 16px from the primary 'Done' button