What's Changed
* New Import and FileApi: New converter, other tiny improvements and fixes by almazgimaev and NikolaiPetukhov in https://github.com/supervisely/supervisely/pull/972
- handle corner case in `api.file.get_directory_size`
- handle corner case in CocoConverter and FastCocoConverter
- raise an exception if dataset not found
- added new .mpg extension for video converter
- new sly converter (append JSON annotations to existing images)
- refactoring: `supervisely/nn/inference/inference.py` and `supervisely/nn/inference/session.py`
**Full Changelog**: https://github.com/supervisely/supervisely/compare/v6.73.96...v6.73.97