The Windows serial (COM/KDCOM) kernel debugging instructions lived in a
long subsection of the Windows support document. Move them verbatim
into a dedicated docs/windows-kdcom-debugging.md and leave a short
pointer in windows.md, so the debugging methods can be documented and
extended independently.
Drop the useless disclaimer. Things should work the same across
different Windows versions.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
Assisted-by: Copilot:Opus-4.8
