Fixed log spam during first-run initialisation.

- Added caching for extracted terrain colors to significantly reduce startup time after first run.
- To further speed up color extraction, terrains from "Stuffed Floors" mod are now excluded because it adds more than 2000 (sidenote: wtf why would you want this) terrains in big modpacks that are never naturally generated anyway.
- Fixed memory usage in cases where ridiculous amount of terrains are present, e.g. in large modpacks.

- Added compatibility patch for "Performance Optimizer" mod to prevent it from causing the game to freeze when generating previews.
- Fixed an issue where spam-clicking world tiles (faster than the preview generator can keep up) caused errors.
- Improved mod compatibility and stability of the "Exact Preview Generator" feature.

Exact Preview Generator is now set to disabled by default, because it seems to break things on specific hardware or mod combinations, not sure yet.

- Added exact preview generator that supports map features added by mods (can be enabled/disbaled in settings)
- Added patch that makes Verse.Rand RNG thread-safe to fix reported inconsistencies between preview and actual map
- Added mod support: [KV] Impassable Map Maker
- Added mod support: Terra Project Core
- Added mod support: CaveBiome

Implemented true terrain colors feature.

Added a patch for MapReroll fixing a bug that causes swamps and modded biomes with multiple TerrainPatchMakers to generate weirdly.

Add Russian translation created by Dmitry6.

Fix preview image.

Initial upload.