Bunnymark performance

Nobody has claimed this yet.

The AnyRender repository has a "bunnymark" benchmark (as an interactive cargo example which logs frame times). It consists of a scene which renders the same small (26 x 37px) image of a bunny many times (configurable), setup in such a way that the all instances of the image are a single `peniko::ImageData` with the same `Blob` and `id`.

Currently with 10000 bunnies, frame times on my machine are:

- Vello CPU ST: 70ms
- Vello CPU MT: 26ms
- Vello Hybrid 36ms
- Vello Classic: 14ms
- Skia Ganesh: 8.3ms (capped at 120fps by vsync)
- Skia CPU: 273ms

## To reproduce

- Clone https://github.com/DioxusLabs/anyrender
- Optional: uncomment the `patch.crates-io` section in the root `Cargo.toml` to patch in local Vello
- Run `cargo run -rp bunnymark`
- Click to add 100 bunnies
- Press space to switch between renderers
- The current renderer and frame time are printed to the console on each frame

You can run Vello CPU ST (Single Threaded) by removing the `multithreading` feature in the bunnymark Cargo.toml.

## Notes

- This is affected by the `ImageQuality` setting. This can be changed in `bunny.rs`.

Start with the bunnymark Cargo example and bunny.rs, then run `cargo run -rp bunnymark` to reproduce the frame-time output across renderers. Compare the results with the ImageQuality setting and the optional root Cargo.toml patch; the issue does not define a target or specific completion condition, so that needs clarification.

Written by the indexing model from the issue text.