What problem does this solve or what need does it fill?

Being able to extract the ComponentId for a given component of type C is surprisingly unintuitive.

What solution would you like?

Create a public method on Component that mirrors Bundle::component_ids().

EDIT: see below; this isn't the right API. These methods should live on World and Components instead.

What alternative(s) have you considered?

1. Use world.init_component::<C>(). This is unintuitive, but basically works.
2. Convert the component type into a bundle, and call (C, )::component_ids(&mut components, &mut storages).iter().next().unwrap(). Which is more than a little cursed.

Additional context

Discovered while working on #1481 with @plof27.