在 markdown 支持 details 的 open 属性

[linpengteng]

Is your feature request related to a problem? Please describe.

目前在 markdown 里，默认是折叠状态，且无法设置 open 属性

::: details 折叠标题 这里显示折叠内容 :::

Describe the solution you'd like

希望可以在 markdown 里，通过如下 {open}, 设置 open 属性, 使其默认是展开状态

::: details{open} 折叠标题 这里显示折叠内容 :::

Describe alternatives you've considered

No response

Additional context

No response

Validations

• [X] Follow our Code of Conduct
• [X] Read the docs.
• [X] Read the Contributing Guidelines.
• [X] Check that there isn't already an issue that asks for the same feature to avoid creating a duplicate.

[linpengteng]

Oh, Now is Support。

::: details 折叠标题 {open} 这里显示折叠内容 :::