docs: Add new sections and descriptions for TeamTrack dataset and alg…

…orithm

- Added a new section for the paper abstract with a title and an image
- Added a dataset description for the TeamTrack dataset
- Added comparison tables for MOT datasets and TeamTrack, and camera and video details
- Added a new section for video previews with a title
- Added a new section for the tracking algorithm with a title and an image
- Added a description of the TeamTrack Algorithm and its components
- Added performance tables for MOT models in football, basketball, and handball