Add Thermal Emission

MDL Identifier: core_definitions::add_thermal_emission

Description: Adds emission to a material, color is based on a color temperature

Display Name	Type	Parameter	Default	Description
Base Material	material	base	diffuse()	The material that will get emission added
Temperature	uniform float	temperature	float(6500)	The color temperature of the light in Kelvin
Intensity	uniform float	intensity	1000.0	The brightness of the light source
Unit for emission	enum	unit	lumen_m2	The physical unit of Intensity