[FEAT] StatsForecast AutoCES forecasting model

[AzulGarza]

Description

This PR includes a new model for the forecast module. AutoCES selects the best model amongst the Complex Exponential Smoothing family. Here's a reference for the model. Since StatsForecast is already included in the dependencies, it wasn't necessary to include it.

Here's a working example,

• Summary of the change / bug fix.
• Link # issue, if applicable.
• Screenshot of the feature or the bug before/after fix, if applicable.
• Relevant motivation and context.
• List any dependencies that are required for this change.

How has this been tested?

• Please describe the tests that you ran to verify your changes.
• Provide instructions so we can reproduce.
• Please also list any relevant details for your test configuration.

• Make sure affected commands still run in terminal
• Ensure the SDK still works
• Check any related reports

Checklist:

• Update our Hugo documentation following these guidelines.
• Update our tests following these guidelines.
• Make sure you are following our CONTRIBUTING guidelines.
• If a feature was added make sure to add it to the corresponding scripts file.

Others

• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.