Improve documentation for installing docker on Windows Home

This is what the official docs have to say:

• Hyper-V and Containers Windows features must be enabled.
• The following hardware prerequisites are required to successfully run Client Hyper-V on Windows 10:
  • 64 bit processor with Second Level Address Translation (SLAT)
  • 4GB system RAM
  • BIOS-level hardware virtualization support must be enabled in the BIOS settings. For more information, see Virtualization.

Our test user has a "very late" build of Windows 10 Home: they went through the requirements trying to find out if they had SLAT. They added:

I couldn’t get the virtualization stuff to work either.

There were a series of more & more complex things for a simpleton like me to do with Hyper-V and Containers Windows. I also enabled WSL1 but didn’t get WSL2 to go.

I don’t know if I was close to getting it going, but each time I got something, I found there was another 2 levels to negotiate.

Start by reviewing the official Docker for Windows Home installation documentation linked in the issue and locate the corresponding installation guidance in this repository. Clarify the Windows Home prerequisites, virtualization steps, and WSL guidance so a beginner can understand the required path and determine when installation is complete.