cli: add "nmcli d wifi show"

A quick overview of the currently connected Wi-Fi network, including
credentials. Comes handy if someone wants to connect more devices to
their Hotspot or the same network as they are connected to.
18 jobs for lr/nmcli-d-wifi-show in 41 minutes and 47 seconds (queued for 3 seconds)
latest
Status Job ID Name Coverage
  Test
failed #772825
allowed to fail
checkpatch

00:01:01

manual #772831
allowed to fail manual
t_centos:7.5.1804
passed #772832
t_centos:7.6.1810

00:27:11

passed #772838
t_debian:10

00:25:06

passed #772837
t_debian:9

00:19:35

passed #772840
t_debian:sid

00:26:23

manual #772839
allowed to fail manual
t_debian:testing
manual #772826
allowed to fail manual
t_fedora:28
passed #772827
t_fedora:29

00:41:45

passed #772828
t_fedora:30

00:22:05

passed #772829
t_fedora:31

00:31:27

manual #772830
allowed to fail manual
t_fedora:rawhide
passed #772833
t_ubuntu:16.04

00:28:18

passed #772834
t_ubuntu:18.04

00:20:37

manual #772836
allowed to fail manual
t_ubuntu:devel
manual #772835
allowed to fail manual
t_ubuntu:rolling
 
  External
passed https://desktopqe-jenkins.rhev-ci-vms.eng.rdu2.redhat.com/job/beaker-NetworkManager-gitlab-trigger-code-upstream/831/

passed https://desktopqe-jenkins.rhev-ci-vms.eng.rdu2.redhat.com/job/beaker-NetworkManager-gitlab-trigger-code-upstream/831/

05:09:47

 
Name Stage Failure
failed
checkpatch Test

clients/common/qrcodegen.h:2: Missing a SPDX-License-Identifier:
> * QR Code generator library (C)

The patch does not validate.
Uploading artifacts...
checkpatch-out.txt: found 1 matching files
Uploading artifacts to coordinator... ok
id=772825 responseStatus=201 Created token=E-U--Bim
ERROR: Job failed: exit code 1