Fix order_sell_stop_loss function argument order to resolve TypeError

[humza-sami]

• Updated order_buy_stop_loss and order_sell_stop_loss functions to fix argument order, resolving TypeError.
• Added corresponding tests in the tests directory to ensure functionality.

[jmfernandes]

@humza-sami hello, can you please fix the merge conflicts, if they are still applicable. I merge some other branches. Trying to get to these changes so I an merge them all!