Enable 9p VIRTIO kernel module

[JumpMaster]

HassOS release with the issue:

Supervisor logs:

Journal logs:

Kernel logs:

Description of problem:
As part of a migration from a Supervised Linux install to HASSOS on KVM I am missing the ability to share a directory with the host os. This is possible within KVM but the OS is missing the required 9p kernel module. This leads to the following error when trying to mount:

mount -t 9p -o trans=virtio,version=9p2000.L hostshare /tmp/host_files
mount: unknown filesystem type '9p'

I believe the two required module are 9pnet and 9pnet_virtio

[JumpMaster]

I've been thinking more about this and it's probably a lot more work then I originally anticipated to have this fully supported. ie. Been able to mount directories from within the supervisor ui.

[xiki808]

I would love to see this. I am currently trying to setup HAOS in an LXD VM and it works, but I cannot run any commands inside the VM from my bash script running at the host, since the agent is missing in the OS