Simple improvements to ambiguity reporting clarity

CONTRIBUTING.md

@@ -260,6 +260,7 @@ If you end up adding a new official Bevy crate to the `bevy` repo:
 
 1. Add the new crate to the [./tools/publish.sh](./tools/publish.sh) file.
 2. Check if a new cargo feature was added, update [cargo_features.md](https://github.com/bevyengine/bevy/blob/main/docs/cargo_features.md) as needed.
+3. Add the new crate to the [stage::BEVY_CRATES](./crates/bevy_ecs/src/schedule/stage.rs) array.
 
 When contributing, please:
 

Cargo.toml

@@ -258,6 +258,10 @@ name = "custom_diagnostic"
 path = "examples/diagnostics/custom_diagnostic.rs"
 
 # ECS (Entity Component System)
+[[example]]
+name = "ambiguity_checker"
+path = "examples/ecs/ambiguity_checker.rs"
+
 [[example]]
 name = "ecs_guide"
 path = "examples/ecs/ecs_guide.rs"