[ENH] Refactor and improve `NaiveForecaster`

[MatthewMiddlehurst]

Describe the feature or idea you want to propose

We should refactor the DummyForecaster into NaiveForecaster and improve its features. The variants listed in https://otexts.com/fpp2/simple-methods.html would be a good start.

Describe your proposed solution

• Refactor to NaiveForecaster
• Add mean
• Add seasonality
• Add drift
• Add testing to tests/test_naive.py
• Update documentation
• Add to API page and ensure tidiness

Describe alternatives you've considered, if relevant

No response

Additional context

No response

[TinaJin0228]

@aeon-actions-bot assign @TinaJin0228

[TonyBagnall]

I dont think we need all these variants, its just for basic benchmarking

• refactor dummy to naive, default to predict last seen value
• add option to predict the series mean
• add option for seasonal naive: predict the last season value

Makradakis finds seasonality in fit, but for now just pass as a parameter. We can add others later