feat: add organizations list command to coder cli (#21960)

follows on from #21940.

The API endpoints existed for this already, so this PR just adds CLI functionality which uses those API endpoints.

Generated with the help of Mux

cli/organization.go

@@ -23,6 +23,7 @@ func (r *RootCmd) organizations() *serpent.Command {
 		},
 		Children: []*serpent.Command{
 			r.showOrganization(orgContext),
+			r.listOrganizations(),
 			r.createOrganization(),
 			r.deleteOrganization(orgContext),
 			r.organizationMembers(orgContext),