Adds a button similar to the user manual at the bottom of each page.
This is done to give people a place to report issues other than the documentation repository which should be limited to the user manual.
With this change also comes a new issue template with helpful text and a redirect for people looking to submit an issue with Blender.
I would also like to add a Documentation label too but that requires configuring with the Gitea project.
Pull Request: https://projects.blender.org/blender/blender/pulls/115865
This commit adds a version switch similar to the one on the user manual,
in the future it would be nice to refactor both of these into a more generic
code that works for both. Maybe develop this into a sphinx extension.
As part of this change I had to change how the blender hash is displayed.
Instead of the version hash in the top left it has been moved to the page footer.
This change will also be backported to 2.93 LTS, 2.93 LTS, and 3.0.
