feat: Add unittest for lessThan with std.checkedint.Checked

Author: gedaiu

source/fluentasserts/core/memory/heapequable.d

@@ -178,6 +178,7 @@ struct HeapEquableValue {
   }
 
   /// Extracts a number from wrapper type notation like "Type(123)" or "Type(-45.6)"
+  /// Issue #101: Supports std.checkedint.Checked and similar wrapper types
   private static double extractWrappedNumber(const(char)[] s, out bool success) @nogc nothrow {
     success = false;
     if (s.length == 0) {

source/fluentasserts/operations/comparison/lessThan.d

@@ -155,6 +155,7 @@ unittest {
   expect(evaluation.result.hasContent()).to.equal(true);
 }
 
+// Issue #101: lessThan works with std.checkedint.Checked
 @("lessThan works with std.checkedint.Checked")
 unittest {
   import std.checkedint : Checked, Abort;