Feature Request: Add energy_source to ThrusterPrototype

[plexpt]

I propose adding an energy_source attribute to the ThrusterPrototype to specify the energy source for the thruster. This addition will enhance the accuracy of performance simulations and help define operational limitations more precisely.

[curiosity]

It doesn't really fit in with the existing API. A better request would be for machines to be able to have multiple energy sources that must be drawn from at the same time. Then redefine the SA thruster to have two fluid energy sources. This will open up a whole lot of possibilities, the common one being an electric machine that also needs an item to function. And fluid energy sources will additionally get a performance curve.