Updated how light range and spot angle are calculated and packed for both editor and runtime scripts, distinguishing between sphere and non-sphere lights. Adjusted shader logic to use new packing for spot light contribution, improving consistency between CPU and GPU representations.
Replaced usage of GetCosHalfAngle() with spotAngleDeg for spot light calculations in both editor and runtime scripts. Updated shader logic to use smoothstep for light contribution falloff, improving spot light edge smoothness.
Renamed all references, scripts, and editor helpers from PlayerPositionsToShader to LightUpdater for improved clarity and consistency. Updated README and editor preview documentation to reflect the new naming. Added new shader Standard_Lightmap_2SP for enhanced lighting and shadow support.
