Update the project page

Problem/Motivation

Last revision of the project page was May 2023, and things have changed since then.

Steps to reproduce

Visit the project page, and see that some of the information could do with an update.

Proposed resolution

Revise each section below, and update or rewrite where it's relevant. Please add comments or suggestions, and strike-out items when they are done.

• What is the Admin Toolbar module?
• How to use Admin Toolbar module?
• Sub-modules
• Version 3
• Development version status
• Complementary modules
• Remove "Toolbar Themes" since it looks like it's not maintained?
• Issues
  • Remove patch naming convention info, since GitLab MR's are used now
  • Remove this bit?

    And please don't forget to use the Issue Summary Template to report an issue, if you need help to understand how the issue queue works, see the Getting Started in the Issue Queue video.

    (see also 📌 Remove info about patch naming convention in issue template Active )

Remaining tasks

User interface changes

API changes

Data model changes