Implement Scan tab in switcher

[Parveshdhull]

As a user I want to have a Scan tab in the switcher.

Switcher and Switcher tabs are being implemented separately. Scope of the issue is to implement QR scanner screen and animations.

Designs

https://www.figma.com/file/eDfxTa9IoaCMUy5cLTp0ys/Shell-for-Mobile?node-id=451%3A18994

Animations

https://user-images.githubusercontent.com/17097240/180041582-52f805b0-af41-44e9-aa9e-518484a1f276.mp4

Principle file https://www.notion.so/Animation-guidelines-49cbc3e7a52b4120850936ca35d959ee

[flexsurfer]

replaced by https://github.com/status-im/status-mobile/issues/14011