[ENH] Implement N-BEATS (Neural Basis Expansion Analysis for Time Series) forecaster

### Describe the feature or idea you want to propose

this is a popular deep learning based forecaster designed for single series forecasting

### Describe your proposed solution

https://arxiv.org/abs/1905.10437

there is a NIXTLA version I think

### Describe alternatives you've considered, if relevant

_No response_

### Additional context

_No response_