Add page for css speak-as property and remove its redirect to @counter-style/speak-as

[skyclouds2001]

MDN URL

https://developer.mozilla.org/en-US/docs/Web/CSS/@counter-style/speak-as

What specific section or headline is this issue about?

No response

What information was incorrect, unhelpful, or incomplete?

same as title

What did you expect to see?

same as title

at least the redirect should be removed

Do you have any supporting links, references, or citations?

Safari support this feature (chrome also support it via speak)

it spec is https://drafts.csswg.org/css-speech/#propdef-speak-as

Do you have anything more you want to share?

No response