Locate a custom classifier and corresponding audio file from the community for using with testing

[joeweiss]

I have a working test case for the custom classifier functions, but I don't have a custom classifier itself for testing.

If you have a classifier, a suitable .wav or .flac file, and you're willing for your work to be used in birdnetlib's test cases, please let me know.

As per the project license, any shared files will be released as part of this project under the open source GPL-3 license.