kScript Access to Price-Level Order Flow

Access to bid volume, ask volume, and delta at each price level per bar - enabling footprint-based indicator development in kScript.

since the kScript v2 buy_sell_volume() function only gives aggregate buy/sell volume per bar - it doesn't break down volume by price level within the bar, so it would be nice to have a data source function to gather bid,ask, delta per any given tick.