Optimize start page of manuals

[sypets]

We have already been changing the start pages of some manuals. This should be optimized and documented.

General:

1. What should be on start page?
2. What should no longer be on start page?
3. What is important? What should be on top?
4. Which information should be grouped together?

Once this is defined, we can figure out how to style this:

1. Should an image be added?
2. How to style / group information

Related:

• Define general structure of a manual #6
• Rework start page and menu structure DocsTypo3Org-Homepage#22 (start page of home - central start page)

[sypets]

Should these we on start page or elsewhere?

• what documentation is about
• what type of manual, e.g. extension manual, tutorial, guide
• official documentation / community documentation
• target audience, e.g. developers, integrators, editors, ...
• experience level: beginner / intermediate / advanced / expert

What should no longer be on start page?

• duplicate information, like
  • date / time last rendered (already in footer)
  • copyright (already in footer)
  • email? (already in Related links: Contact)

maybe:

• version? (already in menu - this is not the case on mobile!)
• author? (already in footer - from copyright text)

Not sure if everything should go on start page, but it could be grouped like:

• meta information (about guide), e.g. licence, credit etc.
• information about editing this guide (for doc contributors)

examples

• start page on readthedocs: https://xp.readthedocs.io/en/stable/index.html

• TYPO3 Explained: https://docs.typo3.org/m/typo3/reference-coreapi/master/en-us/

• extension with image: https://docs.typo3.org/p/datamints/feuser/master/en-us/