Add Support for System Heat about companion_frameworks

[arbsoup]

I've been customizing my own install and found that System Heat seems to have an unusual resource input/output scheme that I haven't been able to write exponents for.

The general form in the case of the reactor module is:

{
	name = ModuleSystemHeatFissionReactor
	[...]
	INPUT_RESOURCE
	{
		ResourceName = EnrichedUranium
		Ratio = [...]
		FlowMode = NO_FLOW
	}
	OUTPUT_RESOURCE
	{
		ResourceName = DepletedFuel
		Ratio = [...]
		DumpExcess = false
		FlowMode = NO_FLOW
	}
}

with Ratio being some decimal number that determines fuel consumption:

https://github.com/post-kerbin-mining-corporation/SystemHeat/blob/d2ee2872720bae7469261d67445649795baf7119/SystemHeat/SystemHeat/Modules/ModuleSystemHeatFissionReactor.cs#L835-L837

The trouble is that I can't seem to select Ratio inside the INPUT_RESOURCE and OUTPUT_RESOURCE blocks. Using the normal selection method for INPUT_RESOURCE/OUTPUT_RESOURCE, but selecting Ratio instead of "rate", should require something like this:

TWEAKSCALEEXPONENTS:NEEDS[SystemHeat,TweakScale]
{
	name = ModuleSystemHeatFissionReactor
	inputResources
	{
		Ratio = 3
	}
}

But this does not affect fuel consumption and does not even produce any note in the log. Using INPUT_RESOURCE and such directly throws this in the log when rescaling:

[TweakScale] WARNING: No valid member found for INPUT_RESOURCE in ModuleSystemHeatFissionReactor for reactor-375-2

I've been able to modify other variables in that module, like the ElectricalGeneration curve, but not these. Is this an actual issue with TweakScale or am I just missing something obvious?