feature request: suspend/resume linux vm via --suspendable flag

[jamesla]

I noticed this doesn't work with linux and thows the error Error: You can only suspend macOS VMs .

I've checked the developer docs for apple virtualisation framework and it doesn't mention anything about this only supporting macos guests under the hood. Is this a tart specific limitation?

Is there any underlying reason why this doesn't support linux vms?

[edigaryev]

Linux VMs cannot be resumed after suspending them, and unfortunately, this is not documented anywhere in the Virtualization framework's documentation.

See #796 for more details.