Nicolas Chapados

Support `simulate` after fitting with `auto_arima`

3

### Is your feature request related to a problem? Please describe. It would be nice to directly support simulating from a fitted ARIMA model, e.g. to have a `simulate` method...

# What's new - Instructions on setting up a basic environment to get started - More robust handling if the per-token cost for a model doesn't exist (assume zero) -...

Add step-by-step installation instructions to run the benchmark (including subsets thereof).

In particular, the `run_baselines.py` function doesn't run at all if ``NIXTLA_API_KEY` is not set, regardless of whether one of the Nixtla models is requested to be run. Key issue is...