FR: Allow saved plans to be placed as nodes

[TheHuggz]

It would be really cool and interesting to allow saved plans to be able to be placed as a special type of node (maybe called a plan, or a factory, or something like that. Personally I like calling them factories because that's what inspired this ask). In this feature the saved plan's inputs (any unconnected demand) and outputs (any unconnected supply) would show up as the inputs and outputs of the placed node. As is currently done with individual machines, a Plan Node's instance count could be modified to multiply the input and output, but likely only in whole number increments. Many of the other input/output adjustments could be deemed irrelevant for a Plan Node, unless you're into that kind of torture 😂

Being able to right click the node to "View Plan" would be sweet.

Seeing that everything is encoded in the url, a plan could simply be represented by it's name, inputs and outputs rather than all of it's buildings. Attempting to view the plan without a plan named that would have to result in a denial of some kind, though.

I feel like this might have a bit of a dependency on the ticket to add resource extractors

[andev0]

Already being worked on in #12

Don't know how soon I will take a time for reviewing, updating and merging the PR, though.