Development Feature: Obtain types for all dependencies

This is a placeholder to track a side effort to obtain complete coverage of types in dependencies.
Currently, we need types for:

- [ ] `fabric`
- [x] `xdgenvpy`, PR: https://github.com/python/typeshed/pull/12615
- [ ] `dotty-dictionary`, bug: https://github.com/01Joseph-Hwang10/dotty-dictionary/issues/6

