支持更多的单位转Pixel

Author: ZhengDaoWang

src/dotnetCampus.OpenXmlUnitConverter/UnitConverter.cs

@@ -42,6 +42,10 @@ public static PixelPercentage ToPixelPercentage(this EmuPercentage emuPercentage
 
         public static Pixel ToPixel(this Inch inch) => inch.ToEmu().ToPixel();
 
+        public static Pixel ToPixel(this Cm cm) => cm.ToEmu().ToPixel();
+
+        public static Pixel ToPixel(this Mm mm) => mm.ToEmu().ToPixel();
+
         public static Inch ToInch(this Pixel pixel) => pixel.ToEmu().ToInch();
 
         #endregion