Fuse COCO and Caipy

[ClementPinard]

Find a way to fuse together COCO and Caipy

• Changes should be as transparent as possible so that you can still load COCO wit the same method call.
• Loading and saving to caipy format should then be the COCO method call with an additional parameter
• JSON schema feature should be transferred to this new IO generic module
• Documentation will need to be updated accordingly, with an additional section on how to use COCO with multiple annotations files, the way caipy was used.

This will make the json schema feature much more accessible since it will be available for COCO

Some thoughts about COCO and json data in general : https://www.notion.so/clementpinard/YACV-Yet-Another-COCO-Variation-352d2b9dff494be4b87de661e9529fe7?pvs=4

[ClementPinard]

For those who don't want to create a notion account (understandable)

Here is a published page version : https://clementpinard.notion.site/YACV-Yet-Another-COCO-Variation-352d2b9dff494be4b87de661e9529fe7