refactor: imports and reorganize domain structure

- Updated import statements across multiple modules to use relative imports for better encapsulation.
- Consolidated and organized the `__init__.py` files in various domain packages to expose necessary classes and functions.
- Improved code readability and maintainability by grouping related imports and removing unused ones.
- Ensured consistent import patterns across the domain, enhancing the overall structure of the codebase.

domain/virtual_fs/processing.py

@@ -16,7 +16,7 @@ class VirtualFSProcessingMixin(VirtualFSTransferMixin):
         save_to: str | None = None,
         overwrite: bool = False,
     ) -> Any:
-        from domain.processors.service import get_processor
+        from domain.processors import get_processor
 
         processor = get_processor(processor_type)
         if not processor: