[dataset] (roco improved v2) Add brightness / contrast / saturation perturbation

common/research/common/constants.py

...n/research/common/dataset/dji/dji_roco_zoomed_datasets.py

...ommon/dataset/perturbations/image_modifiers/brightness.py

.../common/dataset/perturbations/image_modifiers/contrast.py

common/research/common/dataset/perturbations/perturbator.py

common/research/common/scripts/improve_roco_by_zooming.py

common/research/common/scripts/visualize_dataset.py

dataset/dji_roco_zoomed_v2/.gitignore

...nes/research/robots_at_runes/dataset/dataset_generator.py