Better pictures display on a recipe page

[dubadub]

Right now a recipe picture will be displayed only in the recipe list:

We should also display it on a recipe screen here:

And display step images too

Re: https://github.com/cooklang/spec#adding-pictures.

[lpil]

Yes please! 💜

Do they still show on the list? They don't seem to show up for me.

[dubadub]

Done

[dubadub]