Add related content to admin and install documentation

[RishitModi]

Issue number

• Contributes to Add "Related content" as the final section in most pages #1973

Description

This pull request adds Related content sections to selected Plone 6 documentation pages to improve discoverability and navigation for readers.
The following pages were updated:

• docs/install/index.md
• docs/admin-guide/run-plone.md
• docs/admin-guide/configure-zope.md

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Add screenshots or links to a preview of the changes

Preview for docs/install/index.md

Preview for docs/admin-guide/run-plone.md

Preview for docs/admin-guide/configure-zope.md

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📚 Documentation preview 📚: https://plone6--2013.org.readthedocs.build/

[boring-cyborg]

Thanks for submitting your first pull request! You are awesome! 🤗

If you haven't done so already, read Plone's Code of Conduct and Contribute to documentation, as this will greatly help the review process.

Welcome to the Plone community! 🎉

[stevepiercy]

Please revert any changes that are not directly related to the original issue. Reformatting was unnecessary, and many of the changes break the docs rendering.

[RishitModi]

Sorry about that. I’ve reverted the unrelated formatting changes and fixed the rendering issues. Please let me know if anything else needs adjustment.

[stevepiercy]

Remove all explanatory text from the links. Tooltips handle this already.

[stevepiercy]

This is duplicated from, and redundant to, the original immediate above, and doesn't help. Please remove.

Suggested change

	```{seealso}
	If you don't want to use Cookieplone as the recommended way to install Plone with Classic UI for a frontend, read {doc}`/conceptual-guides/compare-buildout-pip` to help inform your choice between Buildout and pip for an installation method.
	```

[stevepiercy]

Actually, none of these sections are needed. The pages are mostly just indices to other content. This doesn't actually help. I'll update the original issue to explicitly state that any Related content links must be actually related to the page content and lead the reader to the next step.