Support anchors in guides

[mabartos]

Description

When referencing some particular section of our documentation/guide to our users, we need to be able to create a link for the required section. However, in the current state of guides published on keycloak-web, it is quite hard to do it.

Even though some sections can be referenced after clicking on the list of sections on the right side, in most cases it cannot be applied to all subsections.

It'd be great to provide anchors for these sections. Ideally, when you hover over the section title, the icon on the left is displayed, and after clicking on that, the URL is changed, and you can easily share it.

When guides are generated in the keycloak/keycloak repository, these anchors are visible, but not on the web.

Example of a Quarkus guide with the anchor:

Our guides don't have it:

Discussion

No response

Motivation

Improves referencing particular sections of guides to users

Details

No response