Migrate to importlib resources

[hendriks73]

When using the musdb package, stempeg needs to be installed, which leads this warning:

site-packages/stempeg/__init__.py:30: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.

I have migrated the code to importlib as per https://importlib-resources.readthedocs.io/en/latest/migration.html.

Please consider updating musdb as well for this PR to matter. 😉

[hendriks73]

Knock knock!

[faroit]

@hendriks73 oops, didn't see this one. I think I had this fixed already in a41eaab, released in v0.2.6

is yours a better fix?

[hendriks73]

No idea. I just still see the warning in my logs. Perhaps musdb also needs to be updated to use your fix?