Cli cleanup

[knitzsche]

refactor cli to a single command with no flags. And add manual mode in which deamon loop is pausable with a clean restart.

• Only commands that the user might want are exposed via --help/-h. For others, see source: cmd/main.go
• Previous cmds/ directory is removed, leaving only cmd/main.go.

sudo 'wifi-connect.cli stop' pauses daemon in current state. Then 'sudo wifi-connect start'.

Removed netplan code in favor of README instructions to set all interfaces to be managed by NetworkManager, since network-manager snap will provide a config to do this step later.

[knitzsche]

FYI Roberto, I think master is ahead by one commit, but it is a README.md change that I made and that I do not want anymore.

[rmescandon]

Approved. This works much better now. Only one thing is still rounding my head and we talked briefly about it, but still is there in my mind: shouldn't be enough stopping the service instead of having a stop command?. I mean. I don't see the advantage of having the daemon looping doing nothing when calling stop. Is that related with maintaining a status when user executes hidden commands to know where we are if back to normal state? In any case. Anything to be changed related to this, in another PR

[knitzsche]

I chose this stop mechanism to allow the user to stop wifi-connect from controlling state in a way that persists through reboots. Stopping the daemon service would not persist through a reboot. So current stop mechanism allows user to stop it persistently without having to uninstall.