Serialize Entity Trees to/from JSON

[craftablescience]

Component to Improve

Core Engine

Describe Your Suggestion

reflect/Props.h has a rudimentary reflection system.

• Should we be using a proper library like RTTR instead? This would help with scripting too
• The current system doesn't work with inheritance, this is a critical flaw Fixed, works with single inheritance
• Entities should be recursively serialized and saved to a scene JSON file
• Scene files can be loaded to restore the scene