Updates text of generate-webhook-url-basic.md to replace the use of
the "Create the channel" step.
Removes {!create-channel.md!} from all the integrations docs that
also include {!generate-webhook-url-basic.md!}.
Fixes#32269.
Using an if block when {!event-filtering-additional-feature.md!}
is used implied that we plan to have this in all webhook doc .md
files.
But, it actually makes sense to only use this macro when the
webhook integration actually supports event filtering.
markdown-include is GPL licensed.
Also, rewrite it as a block processor, so that it works correctly
inside indented blocks.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
This commit:
* Removes the unnecessary screenshot. The UI is intuitive enough
and standalone instructions should suffice.
* Rearranges the instructions into 4 steps.
* Makes the wording more explicit.
