[ENH] Added TCN forecaster in aeon/forecasting/deep_learning

[lucifer4073]

Reference Issues/PRs

Fixes #2937.

What does this implement/fix? Explain your changes.

Adds TCNForecaster in aeon/toolkit.

Does your contribution introduce a new dependency? If yes, which one?

Any other comments?

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[hadifawaz1999]

parameters missing are:

save_last_model, save_init_model and best_model_name and init_model_name, please check any example in aeon/classification/deep_learning to see how to use them

[hadifawaz1999]

Please take a look at this example from deep classification in aeon to see how to handle saving best last and init model, and their names, please do the exact same thing, especially the loading of the best model at the end where we do try and except:

aeon/aeon/classification/deep_learning/_fcn.py

Line 231 in 9357e2f

def _fit(self, X, y):