- Add `heic_types.py` to define structures for HEIC/HEIF boxes including ItemLocationBox, ItemInfoEntryBox, and others.
- Introduce parsing logic in `parser.py` to handle various box types and their contents, including nested structures.
- Implement rebuilding functionality for ItemLocationBox to adjust offsets based on new metadata.
- Enhance ItemInfoBox to correctly parse and build content for ItemInfoEntry.
- Update `pyproject.toml` to include project metadata and dependencies.
nymiro