This fork explores a non-invasive refactor of font measurement logic in response to ClosedXML#1805, aiming to remove dependency on System.Drawing.Common and improve cross-platform support.

Introduce a clean interface for text measurement (e.g., ITextMeasurer) with:

• a minimal built-in fallback implementation (no external deps),
• optional adapters (e.g., SixLabors.Fonts, SkiaSharp, ...) distributed externally.

Work-in-progress. The goal is to make this approach adoptable upstream with no functional regressions or forced dependencies.

Same as ClosedXML (MIT).