[FEATURE]: Support libkrun

[saku3]

Feature Request

I'm propose adding support for libkrun .
libkrun enables running containers inside lightweight virtual machines, providing improved isolation and additional security boundaries compared to native containers.
Supporting libkrun would allow youki to address use cases requiring stronger isolation and confidential workloads.

Is the request related to some problem running youki?

No response

Proposed Solution

The implementation will be based on how crun supports libkrun.
As with the existing WASM support in youki, libkrun integration will be added behind a feature flag.
Therefore, this change will not affect existing features or functionality.

Considerations

No response

Additional Context

If this proposal is accepted, I will proceed with the design and implementation.

[utam0k]

cc: @youki-dev/youki
I'm interested in this proposal. However, I can't imagine how it would affect the architecture of the existing libcontainer. I'd like to discuss the proposal with more detail design architecture.

[saku3]

libkrun: Produce a proper Rust library
containers/libkrun#588

[utam0k]

Good catch!