Account for BigInt in ConvertFrom(object)

Author: RenderMichael

dotnet/src/webdriver/BiDi/Modules/Script/LocalValue.cs

@@ -69,6 +69,9 @@ public static LocalValue ConvertFrom(object? value)
             case double d:
                 return new NumberLocalValue(d);
 
+            case BigInteger bigInt:
+                return new BigIntLocalValue(bigInt.ToString());
+
             case string str:
                 return new StringLocalValue(str);