Add checkpoint/restore support #4477
Description
What is the problem you're trying to solve
Add docker-like container checkpoint and restore capabilities to nerdctl, enabling users to snapshot the state of a running container and restore it on the same or another host.
Describe the solution you'd like
CLI:
- nerdctl checkpoint create: checkpoint: support checkpoint create command #4484
- nerdctl checkpoint ls
- nerdctl checkpoint rm
- nerdctl start --checkpoint|--checkpoint-dir
Additional context
No response