[Feature Request] Support chws feature tag

[fbewivpjsbsby]

Feature Request

Support the chws feature tag, and the vchw feature tag as its vertical flow counterpart.

It deactivates the kern feature.

Use Cases

Potential Benefits

Related Links

https://github.com/kojiishi/east_asian_spacing

[Buernia]

The chws/vchw feature was available in version 1.000 and temporarily removed in version 2.000 due to fewer usage scenarios.

[yisibl]

强烈建议重新添加回来，Chrome 中的标点挤压属性 text-spacing-trim 依赖这个特性。
https://x.com/yisibl/status/1717392998793896092