feat(lights, sirens): add LightsRequireEngine and SirensRequireEngine configuration options

[CanerKaraca23]

Summary

Adds LightsRequireEngine and SirensRequireEngine INI settings under [LIGHTS] to configure whether vehicle lights and emergency siren light patterns/rotators require the vehicle's engine to be turned on.

Details

• LightsRequireEngine (default 0):
  • When enabled (1), vehicle headlights, tail lights, high beams, daytime lights, spotlights, light beams, pointlights, and license plate illumination remain turned off while the engine is stopped (Util::IsEngineOff(pVeh)), matching realistic vehicle battery/ignition behavior.
  • Emergency hazard flashers and vehicle alarms are intentionally exempted from engine requirement.
  • Adds CarUtil::AreLightsOn(pVeh) helper for consistent light status evaluation across features (plate, lights, etc.).
• SirensRequireEngine (default 0):
  • When enabled (1), siren light bars, strobes, and rotators stop cycling when the engine is shut off.
• Fully backwards compatible with existing INI configurations (defaults to 0).