Enable composability while using components.

[ngokevin]

Would like to be able to create something like:

<Light type="directional"/>

while still being able to mix in arbitrary components:

<Light type="directional" geometry="primitive: sphere" material={sphereColor}/>

Can do this by having a React component that detects a main schema and expanding the properties of the schema onto the main component, and then applying the rest of the components as attributes.

<a-entity light="{lightSchemaProperties}" {...otherComponents}>

[ngokevin]

Not going to recommend creating React components to alias one entity.