Feature/sky improvements

[JucanAndreiDaniel]

Sky v2 - rain implemented, new texture per day, fog colors from INI

To test

1. Set time to 16:25 and see if it rains at 16:30 to 17:30
2. Set time to 23:59 and see if the proper textures appear during the day (gray clouds)

Testing

• Tested with PCVR
• Tested with Pico / Quest

[JaXt0r]

Tested:

• 16:30 - rain starts, clouds are moving fast
• 00:00 - Texture swapping, clouds aren't moving

Questions:

1. Is it intended, that rain and skybox always starts at the same game time when I boot the game?
2. Why are clouds moving fast at ~16 but not at ~00?
3. The texture swap at midnight: Is it smooth in original G1 or also a plop like in GVR?

[JaXt0r]

Standalone can be built again and the two mentioned times produce Barrier outcomes as expected. You're good to go.