Add LED_Kingbright_KPA-3010_3x2x1mm model source

FreeCAD source for the Kingbright KPA-3010 series LED STEP/VRML models. It is based on the datasheet referenced in the footprint merge request.

• Models: Add LED_Kingbright_KPA-3010_3x2x1mm models
• Footprint: Add Kingbright KPA-3010 series footprint