MB-25952 Updates couchbase-cli docs
MB-25952 Updates couchbase-cli docs

Added missing subcommands to the top level page.

Change-Id: I7be4d9475fc0f806072ea2446b0173574fd4471b
Reviewed-on: http://review.couchbase.org/83007
Well-Formed: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Michael Wiederhold <a17fed27eaa842282862ff7c1b9c8395a26ac320@couchbase.com>
Tested-by: Michael Wiederhold <a17fed27eaa842282862ff7c1b9c8395a26ac320@couchbase.com>

couchbase/couchbase-cli,couchbase/couchbase-cli