Adjusting uploaded avatar images to be cropped and scaled

Issue idea came from: #28158 (moved)

Problem

People right now have to pre-edit their images to be the correct size and aspect ratio in order for it to end up in a good state as an project or personal avatar. Services such as facebook, google, etc show us that this should be done automatically by a plugin of some sort.

Proposal

Implement an uploaded image adjuster that crops, scales and sets a certain aspect ratio.

examples:

Value

  • Less irritation
  • easier avatars

Related issues

#28158 (moved)

cc: @jschatz1 @nmrony