Add documentation for stats feature
Add documentation for stats feature

Signed-off-by: Michael Crosby <951f4c7b5d47e32d0112c78d14a98eaa23e6b5ef@gmail.com>

ashfall/cli,cpuguy83/cli,redpanda/cli,riyazdf/cli,riyazdf/cli,Zebrilee/cli,allencloud/cli,thaJeztah/cli,ashfall/cli,redpanda/cli,e11137/cli,docker/cli,Zebrilee/cli,docker/cli,allencloud/cli,cpuguy83/cli,dnephin/cli,dnephin/cli,thaJeztah/cli,e11137/cli