MOMENT forecasting

• Original MOMENT repo here.
• Research repo (with experimentation code) here.
• MOMENT paper here.

The structure of the code references the MOMENT forecasting tutorial, and the training/eval code from Time-Series-Library.

Currently tuned for the Stock and Demand datasets. Add more dataloaders and run_xx.py scripts as necessary (though most datasets should follow the current run.py workflow, which is to:

1. pre-evaluate the out-of-the-box MOMENT model,
2. train the MOMENT model either through linear probing (1 pass) or earlystopping (with validation set), and
3. evaluate the trained model.