Proposal for image resizing

[Baerbeisser]

One common issue with i think all (?) implementations of Markdown is resizing of images. Some implementations support using html <img src="source" style="zoom:25%;" />but that's more like a hack out of necessity.

I think Asciidoctor has solved this in a smart way and it would be easy to adopt in Markdown:
![alt,width,height](source) with all places fixed position but optional.

In summary:

• Positions separated by commata
• If 1st position is set, it's an alt text.
• If second position is set, it's image width
• If third position is set, it's image height

Something like width and height but without alt text, would be ![,width,height](source)
Only alt text would be ![alt](source)

Could this schema be adopted by Commonmark?