Adds a section to the demo organizations help center article about
configuring an email and password for demo organization owners.
For demo organization warning banners about needing to configure
an email, add a link to the new section in the help article.
Also, adds a related articles section to the help center article,
and updates the current draft text for changes in how the demo
organization feature is being implemented.
These files are not Jinja2 templates, so there's no reason that they needed
to be inside `templates/zerver`. Moving them to the top level reflects their
importance and also makes it feel nicer to work on editing the help center content,
without it being unnecessary buried deep in the codebase.
Lauryn Menard
Lauryn Menard