Facade_Engine: Update Methods to Handle UValueContinuous Fragment

[vgreen-BH]

Issues addressed by this PR

Closes #2905

• Updated UValueOpeningAW method to handle construction fragment UValueContinuous
• Created new method UValuePanelAW that calculates the u-value of a panel by area weighting the UValueContinuous assigned to panel construction and the u-values of all Openings within the panel

Test files

Test File

[enarhi]

LGTM. Tested the new and altered methods with a variety of openings and panels, including both valid and invalid objects. Result U Values were accurate against manual checks, and errors were clear for the user when invalid objects were used.

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