Finalising the linear dataset/generic dataset format and structure, and verifying metrics calculator
Aiming to have a clean and standardised PyTorch Dataset for the test_linear_regression_session test case. Additionally, want to get the metrics calculations working and to verify their values.
Have renamed the MockLinearTorchDataset class in mocks_linear.py; this will be the format for "de-mockifying" the linear regression test case.
I have also included test_linear_regression.py, which test the Dataset structure and some basic metric calculations.
The next goal is to ensure that all metric calculations can be completed and verified as correct.