[Intent to develop] Ability to modify print, during print.

[Hello1024]

I want to add functionality to switch out the current print, mid print.

My usecase is for someone who is mid way through printing some item, and they decide they want to change some options - for example, adjust the infill density, the layer height, or they have realised the house they are printing really needs a chimney!

I have put more detail on the changes required to the octoprint API here:
https://community.octoprint.org/t/modify-running-print/52546

Do you think this is feasible/desirable to add to this plugin? Any opinions on implementation details, or should I dive right in and send a PR?