fix: fix wetness calculation logic

[TheRiverwoodModder]

• Added Fog wetness
• Refactored wetness calculation logic and made Snow & Rain detection more robust
• Added settings for Fog & Snow Max Wetness
• Moved Max Wetness to CPU to allow for unique values for rain fog, and snow max wetness
• Included Shore Wetness in the Enable Wetness toggle
• Fixed the perPassWetnessEffects struct in WetnessEffects.hlsli

Edit: Removed snow and fog calculation from this PR. Will reintroduce in a later build.

[alandtse]

If we're doing semantic versioning, this should be 0.10.0 since it's a new feature.

[TheRiverwoodModder]

WIll use semantic versioning in future updates.

[alandtse]

I can't test the effect, but if @doodlum is good with it I just have minor comments.

[doodlum]

To do fog, please do something along the lines of:

• Use reversed fog code and run on the GPU at a given distance
• Fog wetness is equal to the brightness * alpha of the fog at that given distance

Otherwise it's going to be too unreliable.

You don't need to extract any information from the weather itself, it's already available in Sky. We only needed to use the weathers to get that particle information, afaik.

[alandtse]

What's the main benefit of the refactor? Performance, fix, feature, maintainability? Not a big deal but just trying to find a better description than chore/refactor which are not version incrementing.

[TheRiverwoodModder]

In that case, "Fix" is probably the best prefix. It fixed several issues and improved the weather transition curve.