Dynamic Script Components

[makspll]

Summary

• The ability for scripts to add their own custom queryable components
• The ability to insert arbitrary data on these, perhaps even set schema

Tasks

• Add dynamic components and ability to register them
• Querying
• Adding dynamic components to global type cache
• Required components (blocked by Reflection - Add a way to register or modify RequiredComponents for a component whose type you don't know bevyengine/bevy#18420)

[Peepo-Juice]

Could we also allow adding hooks?