feat: add image focal point picker capabilities

[federicobadini]

RFC: https://github.com/iFixit/strapi-rfcs/blob/main/rfcs/xxxx-focal-point.md
Diff: strapi/strapi@main...iFixit:strapi:main

Scenario	Image
Focal point mode trigger
Focal point selection
Focal point selected

[strapi-cla]

All committers have signed the CLA.

[MihaiSandor]

Hi everyone, @federicobadini thanks for putting this RFC together.

CC @Bassel17 @derrickmehaffy @alexandrebodin @pierreburgy

+1 from me. Our company needs this feature in production and it is becoming a release level blocker for us. We have content heavy properties where the same image is reused across many breakpoints and placements like hero banners, cards, and social previews. Without a focal point or safe area per asset, the generated crops often cut off the subject and editors are forced to re upload multiple pre cropped variants, which does not scale and creates a messy asset library.

If possible, we would really like to see this included in the next release cycle. Even a first version that supports setting a focal point on the asset and having image transformations respect it would immediately unlock a lot for teams like ours.