feat: JsonContent to markdown string by a function

[qingyou730]

Describe the feature you'd like to request

I have a JSON Content object and I want to convert it into markdown data through a function. I expect this function to be independent and not dependent on the editor. Is there such a function export available

Describe the solution you'd like to see

I have a JSON Content object and I want to convert it into markdown data through a function. I expect this function to be independent and not dependent on the editor. Is there such a function export available

Additional information

I have a JSON Content object and I want to convert it into markdown data through a function. I expect this function to be independent and not dependent on the editor. Is there such a function export available