Support component hooks closures

[mnmaita]

Objective

• Adopted Support closures as ComponentHooks #12287

Solution

• Updated the Component macro to accept closures for ComponentHooks.

Testing

• Compiled locally and tested by altering the component_hooks example.

[mnmaita]

I still have some outstanding questions regarding this change:

• Is the example update any good? Or should I consider doing a "full rework" where we actually showcase the three ways of adding hooks to components in the actual code?
• Should we consolidate RequiredFunc and HookFunc enums since they are essentially the same? I went for a simpler approach but was thinking on creating some DeriveFunc (or similar) to cover both cases and avoid code repetition.

[hymm]

shouldn't this have the changes from bevy_ecs/src/components.rs in #12287 ?

Looking at the discussion in that pr, I'd vote not to support closures for hooks unless a user requests it. Fn can only borrow immutably, which doesn't feel like it adds much functionality here so I'm not sure how useful it would be.