We have an increasing number of design discussions about mobile
these days (which is great), and that means I've started to
regularly point people to this page -- particularly the section
"Guidelines for code contributors" -- as part of pointing them to
the #mobile-design channel to ask a design question.
In that context it seems confusing that it only talks about #design
and not #mobile-design. We do mention the latter elsewhere on the
page, but I still feel I have to explain the discrepancy when
pointing to this section. Fix it here instead.
This introduces to our docs the concept of "a design channel",
meaning #design and #mobile-design and sometimes #zulip-terminal.
Updates all the https://chat.zulip.org/#narrow/stream/ links in the
docs and comments to use the new /channel/ path. All these links are
for documentation/reference purposes only and thus, can be bulk-updated.
This commit is a part of the effort to rename stream to channel.
Updates descriptive text that refer to Zulip channels in the
`docs/contributing` files to use channel instead of stream.
Part of the stream to channel rename project.
