- Move the cacheDir creation to storage_provider from `others.dart`, `custom_extended_image_provider.dart` and `storage_usage.dart`.
- Use the correct directory, `getApplicationCacheDirectory()` instead of the `getTemporaryDirectory()` (which is being deleted by the OS regularly) for cache files.
- remove the `_cacheDownloadPath` from `storage_usage.dart` as the path is never being created in the first place, so using that path in `clearCache()` and `_getTotalDiskSpace()` is unnecessary.
- Fixed the PathNotFoundException for Windows, which doesn't use "/" in directories, but "\".
(flutter: PathNotFoundException: Creation failed, path = 'C:\Users\User\AppData\Local\Temp\Mangayomi/cacheimagecover' (OS Error: Das System kann den angegebenen Pfad nicht finden.)
Instead of manually concatenating paths using string interpolation, it now uses the join function properly.
- Also fixed that the App was not able to create the directories by including recursive: true in the else statement.
