* rhel->rhel8 rename of the include file for install guides
* Add RHEL 9
* Add Alma, Oracle, and Rocky Linux 9 pre-emptively
* Add Alma Linux 9 EOL date
This was removed long ago from the Windows guide (#4119) but it seems like we never got around to removing it from Unix install guides as well.
This note is rather inaccurate and the source of truth for updating Red is available in the Updating Red document.
* Add instructions on how to add pyenv to load path
* Support zsh in pyenv load path instructions
* Make instructions for Mac work when shell-specific profile file exists
* Includes are weird...
* .
* Fix my misunderstanding of what files zsh sources
* Operator precedence, or something like that
* Update some link texts for accessibility
* Fix stuff nearby while we're here
* Reword links to DigitalOcean
* Use better link text for `[p]triviaset custom`
Co-authored-by: jack1142 <6032823+jack1142@users.noreply.github.com>
* Exclude include files from being built
* Split install guides into multiple documents (one per OS/version combo)
* Update references
* Unify anchor names
* Update pyenv requirements in CentOS 7 guide
* Update install guides for RHEL derivatives to not use pyenv
* Add guide for Rocky Linux 8
* 8.4+ -> 8.4-8.x
* Add 'the'
