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

[Zoltan Somogyi]

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.

Zoltan.