Add way to remove 'human' classification from the results

[MaHaWo]

Is your feature request related to a problem? Please describe.
Human classifications are currently still in the data without them being filtered out.

Describe the solution you'd like
Birdnet-Pi has a feature that when a human class is in the top x percent of the classification data it is removed. We should have a similar filter to be on par there.

Describe alternatives you've considered
One can filter them at different points, but in the interest of privacy, we should do this as early as possible.