Add snapshot feature to WSL

[WitherZuo]

Is your feature request related to a problem? Please describe.
No.

Describe the solution you'd like
WSL 2 is a lightweight virtual machine, but it lacks an important feature of a virtual machine: snapshots (or "checkpoints/restore points"), which are key features in VMware Workstation and Orcale VirtualBox, as well as Hyper-V, to save the state of one or more specific nodes for instances in WSL 2, ensuring that after some error changes, they can be restored from the snapshot of the last healthy node immediately. Instead of recreating the entire instance.

Describe alternatives you've considered
As with other existing hypervisors, it should provide feature of snapshot managing (GUI and CLI).

Additional context
The command-line tool can be specified as wsl --snapshot or wsl --checkpoint, and contains --create, --delete, --restore and other similar commands.

[github-actions]

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If this a feature request, please reply with '/feature'. If this is a question, reply with '/question'.
Otherwise please attach logs by following the instructions below, your issue will not be reviewed unless they are added. These logs will help us understand what is going on in your machine.

How to collect WSL logs

Download and execute collect-wsl-logs.ps1 in an administrative powershell prompt:

Invoke-WebRequest -UseBasicParsing "https://raw.githubusercontent.com/microsoft/WSL/master/diagnostics/collect-wsl-logs.ps1" -OutFile collect-wsl-logs.ps1
Set-ExecutionPolicy Bypass -Scope Process -Force
.\collect-wsl-logs.ps1

The script will output the path of the log file once done.

If this is a networking issue, please use collect-networking-logs.ps1, following the instructions here

Once completed please upload the output files to this Github issue.

Click here for more info on logging
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View similar issues

Please view the issues below to see if they solve your problem, and if the issue describes your problem please consider closing this one and thumbs upping the other issue to help us prioritize it!

Open similar issues:

• Allow users to backup / restore their WSLs using WSL Settings (GUI) (#11804), similarity score: 0.72

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[WitherZuo]

/feature

[github-actions]

Diagnostic information

Found '/feature', adding tag 'feature'