Inconsistent Result<TValue> Fail<TValue>(...) implementations when invalid inputs

[Joseph-Steven-S]

What was observed:

// ...
var nullRes = Result.Fail(null);
var emptyStrRes = Result.Fail(string.Empty);


Assert.IsTrue(nullRes.IsFailed);
Assert.IsTrue(emptyStrRes.IsFailed);

What happened:

Assert.IsTrue(nullRes.IsFailed); // Returns False
Assert.IsTrue(emptyStrRes.IsFailed); // Returns False

What is expected:
Consistent exceptions should be thrown like other Fail(...) overloads. Relating discussions: #227

//...
throw new ArgumentNullException(nameof(error), "Error cannot be null");
// ...
ArgumentException.ThrowIfNullOrEmpty(errorMessage, nameof(errorMessage));

Thank you!