Add powershell completion support
Add powershell completion support

Initial version of powershell tab completion. It completes
commands and container names.

Signed-off-by: Sam Neirinck <f16bed56189e249fe4ca8ed10a1ecae60e8ceac0@samneirinck.com>

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