bevy_puffin 0.4.0

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# `bevy_puffin`

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This crate integrates the [`puffin`](https://github.com/EmbarkStudios/puffin) library into Bevy.

It provides `PuffinTracePlugin` to use as a replacement for the Bevy's default `LogPlugin`
plugin and exposes `PuffinLayer`, which allows users to set up [`tracing`](https://github.com/tokio-rs/tracing)
manually with [`puffin`](https://github.com/EmbarkStudios/puffin) as a subscriber layer.

The main goal of this plugin is to demonstrate the missing bits for the `puffin` support in Bevy:
- Add `tracing` integration [(EmbarkStudios/puffin#79)](https://github.com/EmbarkStudios/puffin/pull/79)
- `puffin_tracing` support [(bevyengine/bevy#4730)](https://github.com/bevyengine/bevy/pull/4730)

If these two PRs get merged, there's a good chance that this plugin will be discontinued.

For the usage example, see [`examples/main.rs`](examples/main.rs).

## License

`bevy_puffin` is dual-licensed under either

* MIT License ([LICENSE-MIT](./LICENSE-MIT) or http://opensource.org/licenses/MIT)
* Apache License, Version 2.0 ([LICENSE-APACHE](./LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)

at your option.

## See also

- [`mvlabat/bevy_egui`](https://github.com/mvlabat/bevy_egui)
- [`EmbarkStudios/puffin`](https://github.com/EmbarkStudios/puffin)

## Bevy support table

| bevy | bevy_puffin |
|------|-------------|
| 0.9  | 0.3         |
| 0.8  | 0.2         |
| 0.7  | 0.1         |