[m-rev.] for post-commit review: rewrite and update the MSVC README

[Peter Wang]

On Sat, 31 Jan 2026 15:23:18 +1100 "Zoltan Somogyi" <zoltan.somogyi at runbox.com> wrote:
> 
> 
> On Sat, 31 Jan 2026 01:29:34 +1100, Julien Fischer <jfischer at opturion.com> wrote:
> > For post-commit review by anyone.
> 
> Having never programmed on Windows, I cannot review this for correctness.
> Peter, do intend to review this? If not, I can look over it for clarity.

It looks fine. I've never used MSVC.

Peter