Add Imagenette dataset

[abhro]

For a vision task, the Imagenette dataset would be a good addition (https://github.com/fastai/imagenette), it is already provided by torchvision (PyTorch) and TensorFlow

[ToucheSir]

Some prior art to take inspiration from:

• The Imagenette datasets in FastAI.jl: https://github.com/FluxML/FastAI.jl/blob/72084da1ecdd570496f9165bd8a6d44ccc45f946/src/datasets/fastaidatasets.jl#L90
• Add ImageNet #146