Fix: CSM lights when shadow maps are disabled #27358
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Mugen87
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AdaRoseCannon
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* Fix indentation * Allow shadows to be disabled from GUI * Fix: when shadows are disabled, light contribution still needs to be considered
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Fixed #27338
Description
Even when the shadows are not computed, the light contribution needs to be added.
Fixed example: https://raw.githack.com/ondrejspanel/three.js/fix-csm-shadows-disabled/examples/webgl_shadowmap_csm.html
Note: as shown in the linked issue, I have also included an option to toggle shadows on / off. I think it does no harm, it is something users can play with in the sample and it makes verification of the fix much easier.