Update pre-BiDS'23

[fmariv]

Add

1. GeoJSON with relative path when doing ml-extension
2. Add support for raster labels
3. Add support for creating collections from the folder where the images are with collections = '*'
4. Add implementation for geoJSON labeling generation
5. Add BiDS’23 tutorials
6. Add implementation for using the Sentinel Hub credentials from the creds.json file.

Update

1. Modularize code
2. Decouple labeler logic and create 2 labeling strategies: scan and image_name
3. Update and fix tutorials

Other

1. Tested with several datasets