Adding SSH Client for M5 Cardputer

[Mmatuda]

• This is only a first build... needs evaluating and bug fixes.
• Thanks to @aat440hz I just ported his version to M5-NEMO.
• This PR fixes Battery Info menu flickering and other little bugs;

[n0xa]

Thanks for this! I'm just getting around to reviewing some of the PRs. I need to test this some more but it rebooted trying to connect to my desktop.