Describe the problem you're trying to solve

Sometimes when I write longer posts, I want to put a table of contents on top, like in this post: SN#998456. I usually do it manually, but it would be nice to have an automated option like Kramdown's toc element {:toc}.

Describe the solution you'd like

A markdown element like Kramdown's {:toc} that automatically generates a table of contents based on headers.

Describe alternatives you've considered

I couldn't find any automated solutions other than just manually typing out the table of contents.

Additional context

No response