Image Properties

[Darkhax]

Is your feature request related to a problem? Please describe.
Images need a way to specify their properties. Images can be inline or block elements depending on the circumstances. Being able to specify the width/height of the image is also useful.

Describe the solution you'd like
No solution has been decided.

Describe alternatives you've considered
https://unifiedjs.com/explore/package/remark-attr/

Additional context
This is related to user submitted markdown.