Migrate "call_on_each_event" from api/arguments.json to
/events:real-time in OpenAPI.
This is a bit of a hack, but it lets us eliminate this secondary
arguments.json file, which is probably worth it.
Tweaked by tabbott to fix various formatting issues in the original
documentation while I was looking at it.
Since the Zulip API runs on both developement and production
servers, it is misleading to mention "dev servers" when discussing
zuliprc files.
Also, note that it is better to manually edit all of our JS
examples than to implement macro-like functionality that we use
for our Python examples. For our current purposes, it would be
too much work to build a full-blown testing framework for our
JS code examples just so that we can fix a minor wording issue.
Fixes#10672.
shubhamgupta2956
Eeshan Garg
Tim Abbott