Issue Description

The span_range function typehint the start and end as datetime objects.

def span_range( cls, frame: _T_FRAMES, start: dt_datetime, end: dt_datetime, tz: Optional[TZ_EXPR] = None, limit: Optional[int] = None, bounds: _BOUNDS = "[)", exact: bool = False, ) -> Iterable[Tuple["Arrow", "Arrow"]]

It's will happily work with Arrow objects.

This works because the fromdatetime function will take an Arrow object and convert it again to an Arrow object.

I believe the correct usage it to natively support Arrow objects as input without explicitly converting an Arrow object to datetime just to be converted again internally.