Add the option to set transform-origin for dialogs

[rajmondburgaj]

This function solves the problem (这个功能解决的问题)

I see there is an option to add :transform-origin="'center'" for simple modals, but seems there is no such thing for dialogs, or maybe I can not find it!

Would i be possible to add it as well, so we can have the same behavor for dialogs as well in wanted?

Expected API (期望的 API)

Add a new prop to set the :transform-origin="'center'" for dialogs

[jizai1125]

I tried, it is support though not described in the document.

 dialog.create({
    title: 'title',
    content: 'content',
    transformOrigin: 'center',
 })

[07akioni]

I tried, it is support though not described in the document.

 dialog.create({
    title: 'title',
    content: 'content',
    transformOrigin: 'center',
 })

It should be documented.