Add some UInt256_10x26 tests

Author: Coding-Enthusiast

Src/Autarkysoft.Bitcoin/Cryptography/EllipticCurve/UInt256_8x32.cs

@@ -87,5 +87,11 @@ public static UInt256_8x32 CMov(in UInt256_8x32 r, in UInt256_8x32 a, uint flag)
                 (r.b6 & mask0) | (a.b6 & mask1),
                 (r.b7 & mask0) | (a.b7 & mask1));
         }
+
+        public bool Equals(in UInt256_8x32 right)
+        {
+            return ((b0 ^ right.b0) | (b1 ^ right.b1) | (b2 ^ right.b2) | (b3 ^ right.b3) |
+                    (b4 ^ right.b4) | (b5 ^ right.b5) | (b6 ^ right.b6) | (b7 ^ right.b7)) == 0;
+        }
     }
 }