feat(config): add deep path availability

[richrdkng]

🚀 Description

When dealing with deeper dir structures, e.g.:

-root/
 - docs/
 - scripts/
  - tasks/
 - src/
  - __internal/
 - tests/
  - fixtures/
  - utils/

...a feature should be available to parse and provide @ paths for tasks, __internal, fixtures, and utils, e.g.: path('@fixtures') and so on.

💡 Solution

Implement a deep path parsing feature (and also a config) for these situations.