Bevy wave loop

When to use

Load this when enemies arrive in waves and the wave index advances after a clear.

ECS shape

• Components: a wave index and a remaining-count you define.
• Resources: run-wide tables live in a resource (bevy-data-resources), not an autoload.
• Systems: mutate those components on Update or the fixed timestep. Use .chain() when damage must land before death.
• Messages: one-shot facts (hit, pickup, quest advance) go through bevy-events-messaging. This file does not add a new event type name.

Coming from Godot