Use the official Tastyworks API for exporting the transaction history

[MiErnst]

Exporting the CSV is very error prone and causes a huge effort. Tastyworks released an official API to export the transaction history today: https://support.tastyworks.com/support/solutions/articles/43000700385-tastytrade-open-api

This issue replaces my created issue #28

[laroche]

I've already checked the new interface a little bit. Download of all history data seems to work ok
and tastyworks wants to settle on this new format for the future. Old and new format also seem to
list identical data for my account going back to 2017.

So adding this new text format should be implemented...

best regards,

Florian La Roche

[MiErnst]

I really would like to see this, but the result from the API should be stored in a local file that should than be processed by the tool. So the user can adjust the file if necessary like I did in case the strike price was adjusted while holding the option.