3f7b4916e9bcd89bb289f3b1d5749c5bcb956f6a

* Added the Phong BRDF from the inbuilt OSL shader library. This can be used in OSL shaders only for now: * phong(normal N, float exponent) * phong_ramp(normal N, float exponent, color colors[8]
change templates to call modal_handler_add() is called last since any errors between calling this function and returning will crash blender. see [#30687]
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