Support Markdown Table of Content

[ansidev]

Clear and concise description of the problem

I expect that I can access Table of Content of a markdown file via frontmatter.toc.

Suggested solution

Use @mdit-vue/plugin-headers

Alternative

No response

Additional context

No response

Validations

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