Use epsilon-aware greater than in TextLine and TextFormatter (#20650)

Co-authored-by: Julien Lebosquain <julien@lebosquain.net>

src/Avalonia.Base/Media/TextFormatting/TextFormatterImpl.cs

@@ -1,4 +1,4 @@
-// ReSharper disable ForCanBeConvertedToForeach
+// ReSharper disable ForCanBeConvertedToForeach
 using System;
 using System.Buffers;
 using System.Collections.Generic;
@@ -658,7 +658,7 @@ namespace Avalonia.Media.TextFormatting
                                         clusterLength = shapedTextCharacters.GlyphRun.Metrics.FirstCluster + currentRun.Length - currentInfo.GlyphCluster;
                                     }
 
-                                    if (currentWidth + clusterWidth > paragraphWidth)
+                                    if (MathUtilities.GreaterThan(currentWidth + clusterWidth, paragraphWidth))
                                     {
                                         if (runLength == 0 && measuredLength == 0)
                                         {

src/Avalonia.Base/Media/TextFormatting/TextLineImpl.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Diagnostics;
 using Avalonia.Media.TextFormatting.Unicode;
@@ -1423,7 +1423,7 @@ namespace Avalonia.Media.TextFormatting
             var overhangLeading = inkBounds.Left;
             //The width of overhanging pixels at the end of the natural bounds. Positive value means we are inside.
             var overhangTrailing = widthIncludingWhitespace - inkBounds.Right;
-            var hasOverflowed = width > _paragraphWidth;
+            var hasOverflowed = MathUtilities.GreaterThan(width, _paragraphWidth);
 
             var start = GetParagraphOffsetX(width, widthIncludingWhitespace);