Provide snippets preview for hover, not copy it or download

[zyyv]

Clear and concise description of the problem

I want to implement a code snippet preview in this area, instead of copying or downloading it. Implementing a preview in this area will not cause frequent switching and lead to detachment from the main body.

Suggested solution

i'll use shiki + floating-vue implement it.

Alternative

No response

Additional context

No response

Validations

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