Yolov8 parse roboflow datasets (#28)

* Add new test cases for handling wrong paths

* Add support for handling wrong paths from roboflow.

* Implement support for intentional ../ paths

* Restructure tests

* Adding types

* Revert custom types

* Cleanu types for tests

* Add underscore to test classes

Author: IgorSusmelj

src/labelformat/formats/yolov8.py

@@ -69,8 +69,19 @@ def _root_dir(self) -> Path:
         return self._config_file.parent
 
     def _images_dir(self) -> Path:
+        """Get images directory from YOLOv8 config file with fallback logic."""
         root_dir = self._root_dir()
-        return root_dir / str(self._config_data[self._split])
+        split_path = str(self._config_data[self._split])
+        # Try original path first, then fallback to modified path for Roboflow-style configs
+        path = root_dir / split_path
+        if (
+            not path.exists()
+            and "path" not in self._config_data
+            and split_path.startswith("../")
+        ):
+            split_path = split_path.replace("../", "./", 1)
+            path = root_dir / split_path
+        return path
 
     def _labels_dir(self) -> Path:
         """Get labels directory from YOLOv8 config file.