Show the full step number from algorithm step

[marcoscaceres]

Is your feature request related to a problem? Please describe.
For deeply nested algorithms (or any algorithm really), it would be nice to somehow get the step number (e.g., "step 3.4.5.2").

Additional context

For example:

[xfq]

FYI, some documents I'm working on also have this kind of deep list, for example, this list is 4 levels deep: https://xfq.github.io/testing/jlreq-li-self-links/#id637

(I added ¶ to the left of each item, which can be used to link to the item. However, many algorithm steps don’t have IDs, so we should probably generate the step number and write it to the clipboard.)

[marcoscaceres]

ah, nice one @xfq. Yeah, want to build something like that.