rmv-bevy-testing-tools 0.8.0

Write simple tests for bevy systems, using rstest, insta, and speculoos.
Documentation 
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# CollectMessages

```rust
use bevy::prelude::*;
use rmv_bevy_testing_tools::prelude::*;
use rstest::rstest;

#[derive(Debug, Default, Message)]
enum MyMessage { #[default] A, B, C }

#[rstest]
fn some_test(#[from(test_app)] mut app: TestApp) {
    // before test, use 1 of these
    app.collect_events::<MyMessage>();
    app.collect_events_only(MyMessage::This);
    app.collect_events_any_of([MyMessage::A, MyMessage::C]);

    // ...

    // after test
    app.get_collected_events::<MyMessage>();
}
```