WSL2 handling

[kilrau]

Off-shoot from #72:

wsl screen: add link to instruction how to disable wsl (first link contains info only about wsl patch installation).
wsl screen: after wsl installation, windows reboot is required (even if u rebooted the PC before (after docker installation)). Would be good to mention it before displaying Waiting for docker start screen. (I spent ~15 mins in attempts to run docker after installation).
wsl screen: integrate wsl installation/disabling into docker installation process with minimum user actions.

What we should do imo:

• if Windows version <2004, disable WSL2 in docker and go with legacy Hyper-V backend (requires another system reboot)
• if Windows version >=2004, unattended install of WSL2. Some research needed if and how that is possible, probbaly there is a reason why the docker install process throws a link to download an .exe from Microsoft but it's pretty bad UX. I found Unattended install of WSL microsoft/WSL#3369 and opened Unattended install of WSL2 microsoft/WSL#6201

[kilrau]

Closing in favor of #96 (comment)