Build a system to modify objects via reflection

[JonnyOThan]

• Simple field/property modification
• support components
• support finding child objects with non-unique names (e.g. spotlights in vab)
• support nested objects
• support non-gameobject singletons (e.g. render settings)
• arrays, containers?
• support reference fields (materials, etc)
• support math operations (+=, etc)