Add Big Int Support to runningDifference Function

Why it matters

This feature extends the runningDifference function to handle big integer types, enabling users to compute running differences on larger integer values without loss of precision or errors. It improves the function's usability for datasets involving high-range integer values.

How to use it

Use the runningDifference function as usual on columns or expressions of big integer types (such as Int64 or UInt64). The function now natively supports these types without any additional configuration.