Improvement suggestion - offer to resolve issues with subuid/subgid for rootless Podman installs

[kmarf]

The only issue I faced when testing WinBoat on Fedora with Podman was insufficient UIDs or GIDs available in user namespace as logged in the ~/.winboat/install.log file and was easily resolved using the following commands:

sudo usermod --add-subuids 100000-165535 --add-subgids 100000-165535 $USER
podman system migrate

I suggest checking for this automatically and offering to fix at install time if it makes it easier for other users on Fedora with Podman. My only other suggestion is to offer native export/update of the ~/winboat/data.img raw virtual disk image file for any other available Linux virtualization tools as on Fedora I only had a 'Virtual Machine Manager' tool which could easily import the file to a new VM manually but would be great if that was also done as part of the WinBoat installation.
Thanks for an interesting and useful Windows virtualization workflow acceleration tool, keep up the great work!