feat: export descriptions as GPX

[ptpt]

This pull request refactors type handling across multiple modules in the mapillary_tools package to improve code consistency and maintainability. Key changes include replacing references to types.UserItem with config.UserItem, introducing new serializers for metadata, and simplifying GPX-related functionality.

Type Refactoring

• Replaced types.UserItem with config.UserItem in mapillary_tools/authenticate.py to align with the new UserItem schema defined in mapillary_tools/config.py. Updated functions such as _validate_profile, _verify_user_auth, and _list_all_profiles accordingly. [1] [2] [3] [4] [5] [6]

Serializer Integration

• Introduced DescriptionJSONSerializer and GPXSerializer for metadata handling in mapillary_tools/serializer. Updated methods in mapillary_tools/history.py, process_geotag_properties.py, and process_sequence_properties.py to use these serializers for metadata serialization and validation. [1] [2] [3] [4] [5]

GPX Handling Improvements

• Added GPXSerializer to mapillary_tools/serializer/gpx.py, enabling streamlined serialization of GPX data. This includes handling image sequences, video metadata, and error metadata as GPX tracks and points.

Utility Function Updates

• Replaced types.datetime_to_map_capture_time and types.map_capture_time_to_datetime with build_capture_time and parse_capture_time from serializer.description in geotag_images_from_gpx.py and sample_video.py. This simplifies date-time conversions. [1] [2]

Code Cleanup

• Removed unused imports and consolidated type definitions in config.py. Simplified DEFAULT_MAPILLARY_FOLDER initialization and refactored load_user and list_all_users functions to use the new UserItem type. [1] [2] [3]