This PR addresses part of #95. Reflex isn't integrated into UniState yet. This PR wants to add that feature.

• Gives state machines the container context so they can resolve states with Reflex.
• Adds Reflex.ContainerBuilder extensions allowing to use:
  • builder.AddStateMachine<TInterface, TStateMachine>();
  • builder.AddState<TInterface, TState>();
  • builder.AddState<TInterface>(Type stateType);
  • builder.AddState(Type stateType);
  • AddSingletonState and AddSingletonStateMachine variants are also available for singleton registrations.
• Ports the Dice Game tutorial into new Reflex scene: ReflexDiceGameScene.unity

This is the API:

  builder.AddStateMachine<IStateMachine, StateMachine>();
  
  builder.AddState<IState<EmptyPayload>, LostState>();
  builder.AddState<IState<EmptyPayload>>(typeof(LostState));
  builder.AddState(typeof(LostState));
  
  builder.AddState<IOtherState, LostState>();         // Errors at compile time
  // Should be builder.AddState<IOtherState, OtherStateImplementation>();
  
  builder.AddState<IOtherState>(typeof(LostState));   // Errors at runtime
  // Should be builder.AddState<IOtherState>(typeof(OtherStateImplementation));
  
  builder.AddState<IMyState, MyState>();

Additional notes:

Reflex needs to add an Assets/Resources folder to properly work where ReflexSettings ScriptableObject lives, I also made a ProjectScope prefab that includes the ProjectScope script and added it to the settings.

This is because Reflex uses the ReflexSettings to load all global state through every ProjectScope passed to it, allowing a cleaner separation of concerns if needed.

I also added Reflex to the UniStateTests.Common assembly definition references as I had some errors that required that but I'm not sure why.