FR: Make individual revset (etc.) functions linkable in docs

[arxanas]

Is your feature request related to a problem? Please describe.

Currently, you can get the link to a section in the docs via the paragraph symbol/icon for the headers. For example: https://jj-vcs.github.io/jj/v0.26.0/revsets/#functions

However, I don't see a way to link to an individual functions (since they're just entries in an unordered list?).

Describe the solution you'd like

Add buttons/links to the docs for individual functions.

• If we add them as separate headers, then they'd also appear in the sidebar, which is good? But if we add them as separate headers, the docs might get a little clunky/unwieldy.
• It might also work to add inline anchors (and somehow surface them to users).

Describe alternatives you've considered

In the longer term, it might be good to generate formal documentation for the revset (etc.) functions via a normal API reference system.

Additional context

N/A

[shanesveller]

There are preferable solutions in revising how the docs are generated, but linking to text fragments that don't have individual anchor tags appears to be supported in all major browsers now.

Example:
https://jj-vcs.github.io/jj/v0.26.0/revsets/#functions:~:text=empty()

[joyously]

Hey, thanks for that link! I didn't know that text fragments were a thing... I can make use of this, especially for my search script.