Renames article about organization language used for automated
messages and invitation emails. Creates URL redirect and updates
links in repository (web app, help center and api documentation).
Prior to this change, the article was named:
'change-the-default-language-for-your-organization'.
Fixes#21949.
Extends the URL redirect system used for documentation pages to corporate
landing pages. This makes it easier and consistent for contributors who
work on both areas to create new URL redirects when needed.
Creates `zerver.lib.url_redirects.py` to record old and new URLs
for documentation pages that have been renamed/moved and need URL
redirects.
This file is then used by `zproject.urls.py` to redirect links and
by `zerver.test.test_urls.py` to test that all of the old URLs
return a success response with a common page header/text depending
on the type of redirect (help center, policy, or API).
Adds a section to contributor docs on writing documentation for
how to use this redirect system when renaming a help center or api
documentation page.
Fixes#21946. Fixes#17897.
