feat: Zoom and pan images in the viewer

[y-lohse]

(3) [PHO] Ajout du zoom et du drag à la visionneuse sur mobile

[y-lohse]

I considered moving the pan and zoom code into a HOC, but ultimately I decided against it because there are a few places where the photo viewer and this code are tightly coupled:

• the toolbar is hidden when a gesture starts
• the swipes are disabled when there's a zoom
• it needs access to the wrapper and the photo DOM elements

It's possible to make these things generic and package everything into a library, but I don't think it would make the code clearer. IMO the pan & zoom code is related to the photo viewer, and only the photo viewer, so that's where it should be.

[enguerran]

I like when we apply SRP, and the component here has way too much responsibilities. But if you did consider every possible solution, I can swallow back my SRP needs.