AFCsvFacade.load_and_predict() returns the first item in the schedule

The facade API is really useful. However, when called to make a prediction it picks the first item in a schedule, i.e. the item with the shortest allocated budget. Is this intentional?

E.g. my problem sets the runtime limit to 3600 and in the AF logging output I get
`Selected Schedule [(algorithm, budget)]: [('algo_tree', 1), ('algo_mdd',3601)]`
But the output from `AFCsvFacade.load_and_predict()` just returns `algo_tree`. This is because the method [(src)](https://github.com/automl/AutoFolio/blob/f296f528b1b684d36837075b0e8160e3fa4124f7/autofolio/facade/af_csv_facade.py#L79) just returns `pred[0][0]`.

Is this correct / intended? If only 1 sec of budget is set to `algo_tree`, but 3601 to `algo_mdd`, but I can only use 1 choice, which should it be? Perhaps I'm misunderstanding.

Start in autofolio/facade/af_csv_facade.py at the load_and_predict() implementation around line 79, and inspect how its pred schedule is assembled and consumed. Determine the intended single-choice behavior when schedule budgets differ, then make the facade behavior and its documentation consistent with that decision.

Written by the indexing model from the issue text.