move pytest fixture into submodule

[2bndy5]

It seems that pytest will use the monkey_patch_sys_paths fixture if anything is imported from circuitpython_mocks package (from the test module). It might be better to move this fixture into a submodule instead of residing in the package's root.

[2bndy5]

I could just remove the autouse=True and instead rely on the test code to manage the fixtures used. See pytest's usefixtures docs.

[2bndy5]

Tip

See also pytest's recommended design in their docs.