
Introduces `BKE_appdir_folder_caches` to get the folder that can be used to store caches. On different OS's different folders are used. - Linux: `~/.cache/blender/`. - MacOS: `Library/Caches/Blender/`. - Windows: `(%USERPROFILE%\AppData\Local)\Blender Foundation\Blender\Cache\`. Reviewed By: Severin Differential Revision: https://developer.blender.org/D12822