Component Lifecycle Query Filters

[xentripetal]

It would be very helpful if query descriptions had support for defining filters based on the lifecycle of components.

Mainly:

1. Added<T> - Evaluates to true when component T was added to an entity since the last execution of the query
2. Removed<T> - Evaluates to true when component T was removed from an entity since the last execution of the query
3. Changed<T> - Evaluates to true when component T was accessed mutably or set for the entity since the last execution of the query

This is a feature present in bevy_ecs (Rust), DefaultECS (C#), and Unity DOTS

I'm not sure how feasible this is with Arch's architecture, but figured I'd put the idea out there since I'd love to see it in Arch.