Supports configure lossless encoding

Some sampling of use cases:

- Recording local artifacts at the highest quality for subsequent processing by more advanced creation pipelines.
- Working with screen-shares where 4:2:0 sampling causes blurriness. 4:4:4 is required for crisp text at small font sizes.
- Remote processing of audio signals via ML can be affected by audio encoding (hence why WebSpeech encodes to FLAC today).

## Spec issue

https://github.com/w3c/webcodecs/issues/258

> CQ (Constant Quality) or CRF (Constant Rate Factor in FFmpeg) or QP (Quantization Parameter each codec spec defined) are more fit than target bitrate for some content to keep certain quality includes lossless quality through presentation.

## Chrome implementation

A preliminary implementation has been completed in Chrome.

https://issues.chromium.org/issues/40243791

从链接的 W3C WebCodecs issue 和所引用的 Chrome 实现开始，以了解提议的无损编码配置。然后检查仓库的 WebCodecs 编码接口；当 Node.js 实现能够为相关编码用例配置无损质量，并且其行为得到验证时，工作即完成。

由索引模型根据 Issue 内容生成。