Add optional mapping file for tuning light conditions for each map

[vE5li]

Korangar uses a very dynamic ligthing system but the maps are obviously not designed with that in mind. It would be nice if it was possible to disable the directional lighting (for example in caves / closed rooms) and apply some adjustments.

My current idea is to have a sigle file in the client directory, something like lighting.ron, that contains this information:

{
    "geffen": (
        directional_light: true,
        directional_light_intensity: 0.8,
    ),
    "pay_dun00": (
        directional_light: false,
        ambient_light_intensity: 0.8,
    )
}

Any missing fields should use a default value. The default values should be

• directional_light : true
• directional_light_intensity : 1.0
• ambient_light_intensity : 1.0