Facade_Engine: Update UValueAW methods to handle unique EdgeUValue for each opening edge

[vgreen-BH]

Description:

The facade UValue fragments are currently organized so that EdgeUValue is a property of the opening construction which means there can only be one EdgeUValue assigned per opening. This structure works for early design and generic calculations.

In later design thermal calculations where more detailed U-values are available from project THERM models, there is typically a unique EdgeUValue for each edge of the opening. To allow for these cases we would like to add additional capabilities to assign an EdgeUValue fragment to FrameEdgeProperties so there can be a unique value for each edge. The UValueAW calculation method will be updated to handle both cases.