Annotation file support

[gauravparajuli]

hey,

if you want a high level overview on how to use this new feature: https://github.com/gauravparajuli/pybboxes/tree/annotation-file-support?tab=readme-ov-file#annotation-file-conversion

I included a small coco dataset (196 files) with about 8 megabytes size in the testing directory to check the conversions during unit tests.

currently, also, attempts to either load or write as albumentations and fiftyone raises a not implemented error.

please let me know what you think of this.