[Feature]: Abstraction of `GenericDataset` and `DfDataset`

[aiakide]

✏️ Problem Description

At the moment there is a KerasGenericDataset and a KerasDfDataset that implements GenericDataset or DfDataset. This is because there are some customizations for Keras. If we use PyTorch in a future release, there are some PyTorch specific functions within the abstract GenericDataset or DfDataset. This should be fixed.PyTorch-specific

💡 Feature Request

Make GenericDataset and DfDataset more abstract and move PyTorch-specific functions to a corresponding PyTorch dataset.

I would prefer to move every framework-specific code inside a separate library.

🌍 Context

This makes it easier to make frame-specific changes in the right place.

🔍 Additional Information

No response

👍 Code of Conduct

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