fix(Server): Stop server without deadlocking on clients; add `server show` and `server clients`
fix(Server): Stop server without deadlocking on clients; add `server show` and `server clients`

stencila/stencila,stencila/stencila,stencila/stencila,stencila/stencila,stencila/stencila,stencila/stencila,stencila/stencila