[Generator] Create a Generator plugin

A Generator is a mechanic that produces an Output over time, optionally consumes an Input

interface GeneratorDefinition {
  id: string
  output: Output | Output[]
  conditions?: Condition | Condition[]
  input?: Input | Input[]
}

interface GeneratorState { isActive: boolean }

TODO

• How to deal when you cannot consume the input, does it turn off or not produce/consume that tick?
• Currently outputs don't have support for being applied fractionally over time, which would be needed for this plugin. We could add something like fracture(fraction: number) next to modify(). Since all input and output is handled through the engine, you could update engine.produce() to add a fraction. I think that is fine for now as it is always a linear scaling fraction
• This would work for now, but not when we have complex outputs that require functions to calculate their amount, which is always static now.

Other

• This is similar to a previous mechanic I had designed called Boosters, which are more focused on modifiers
• This is also similar to another mechanic call Actions, but those are transactions after time has elapsed

But it is probably best to keep them separated into different plugins!