Implement N-BEATS as MoStress Neural Network Architecture

[arturossouza]

Reference for Implementation

1. Paper: https://arxiv.org/pdf/1905.10437.pdf
2. Base Implementation 1: https://github.com/ServiceNow/N-BEATS/blob/master/models/nbeats.py
3. Base Implementation 2: https://github.com/mrdbourke/tensorflow-deep-learning/blob/main/10_time_series_forecasting_in_tensorflow.ipynb
4. Implementation Video 1: https://www.youtube.com/watch?v=hPR9LofYhjI&ab_channel=DanielBourkearXiv
5. Implementation Video 2: https://www.youtube.com/watch?v=pUUhQyUEZSk&ab_channel=DanielBourkearXiv