feat(lights): add independent high beam dummy nodes and material colors

[CanerKaraca23]

Resolves #213

Summary

Adds support for independent high beam dummy nodes (highbeam_l, highbeam_r, highbeam) and dedicated material RGB color codes (highbeam_r: 0, 255, 197 and highbeam_l: 255, 172, 0), enabling vehicles to separate low-beam and high-beam light sources and materials.

Changes

• Dummy Node Support: Added highbeam_l, highbeam_r (cars) and highbeam (motorcycles/center lights) detection in HeadlightComponent.
• Material Color Detection: Added MagicColors::HIGHBEAM_R (0, 255, 197) and MagicColors::HIGHBEAM_L (255, 172, 0) in src/features/core/colors.h mapped to eMaterialType::HighBeamRight and eMaterialType::HighBeamLeft.
• Rendering & Corona Sizing: When high beam dummies exist, low-beam headlights do not scale up on high-beam toggle; instead, high-beam dummy coronas, point lights, and directional shadows are rendered independently while high beams are active.
• JSON Configuration: Added fallback support for "highbeam" in lights JSON configuration block.
• Enums & API: Added HighBeamLeft and HighBeamRight to eMaterialType and ME_LightID.