hotfix/forecast-make-intraday-work: An attempt to make intraday data work with forecast functions

[deeleeramone]

This might not be the best way to go about it, but it appears to work and would resolve a long-standing issue. The charts are lacking range breaks when intraday, so a bit of love is needed there.

This removes the process which was formatting everything as %Y-%m-%d, and changes the frequency setting to default as D instead of B.

Before:

After:

This does not work with TimeGPT because it doesn't use the helpers or common params the rest of the menu uses. @DidierRLopes, any insight here how we can get intraday to work there?

Actually found a way to make it work where it resamples to Hourly:

• Format dates as %Y-%m-%d %H%M%S instead of stripping the time.
• Use freq=H for the command.
• Daily, freq=D for the command.

The TimeGPT command could use a bit of cleanup to make default states and parameters to be like the other models.