Support for tta, tak audio format

I thought supporting these two formats may be quite simple; it just requires adding them to `formats` and `__init__`, and my tests confirm this.

Because tta uses id3 and tak uses apev2.

Locate the `formats` and `__init__` definitions in the repository and review how existing ID3 and APEv2 formats are registered. Confirm the existing tests for the proposed changes, then add support for tta using ID3 and tak using APEv2; done means both formats are recognized and their metadata tests pass.

Written by the indexing model from the issue text.