Hude rework to move the batch to a DTO to make it far more modular to the future ui

testing/test_bucket_dataloader.py

@@ -22,7 +22,7 @@ batch_size = 4
 dataset_config = DatasetConfig(
     folder_path=dataset_folder,
     resolution=resolution,
-    caption_type='txt',
+    caption_ext='txt',
     default_caption='default',
     buckets=True,
     bucket_tolerance=bucket_tolerance,