Updated default values for ConVars:
• dfl_flicker: from 3 to 2
• dfl_points: from 10 to 12

Added new ConVars:
• dfl_maxdistance: controls max render distance (500–4000)
• dfl_update_rate: controls update frequency (0–1)
• dfl_flickerquality: sets flicker quality (1–3)

Improved flicker effect:
• Flicker now smoother and affected by quality setting
• Flicker intensity scaled with random variation

Optimized light points calculation:
• Flicker applied per light point with individual targets

Added distance-based fading and culling:
• Lights fade out beyond max distance
• Entities removed if too far or invalid

Refined fire color gradient:
• Smooth color interpolation through multiple gradient stops
• More realistic fire color transitions

Changed rendering hook to RenderScene for better performance
Added proper cleanup on entity removal and shutdown
General code cleanup and optimization for readability and efficiency