patch 9.1.2125: MS-Windows: DirectX rendering can be improved

patch 9.1.2125: MS-Windows: DirectX rendering can be improved

Problem:  MS-Windows: DirectX rendering can be improved
Solution: Use lpDx advance, fix vertical text shift and correct
          font-size calculations (Yasuhiro Matsumoto).

This changes DirectWrite rendering to:
- Respect lpDx-provided advance widths instead of always adjusting to
  cell width.
- Use a fixed baseline derived from cell geometry to prevent vertical
  shifts when font fallback occurs (e.g. with CJK characters).
- Correctly convert LOGFONT lfHeight to DirectWrite font size using font
  metrics for closer GDI compatibility.

closes: #19254

Signed-off-by: Yasuhiro Matsumoto <mattn.jp@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>