Co-authored-by: Bjorn Neergaard <bjorn@neersighted.com>

* add docs for multiple maintainers example

updates:
- [github.com/hadialqattan/pycln: v1.3.2 → v1.3.3](https://github.com/hadialqattan/pycln/compare/v1.3.2...v1.3.3)

This change ensures that we respect `POETRY_CONFIG_DIR` as well as
ensure environment variables are respected for `POETRY_CACHE_DIR`.

This change also fixes an issue with repository cache directories not
respecting base cache directory configuration changes.

* Changes in docs for Issues #4800, #3709, #3573, #2211, #521 and PR #2414

- Added section about `extras` in `dependency-specification.md` (#2414)
- Added note about VCS inclusion and exclusion in `include`/`exclude`
sections of `pyproject.toml` (#4800)
- Added link to dependency specification in `add` command documentation
(#3573)
- Added more info on default behaviour and cleaned up
`virtualenv.in-project` setting documentation (#3709)
- Added missing configuration options to `configuration.md` (#2211)

Co-authored-by: Arun Babu Neelicattu <arun.neelicattu@gmail.com>

Co-authored-by: Randy Döring <30527984+radoering@users.noreply.github.com>

Co-authored-by: Arun Babu Neelicattu <arun.neelicattu@gmail.com>
Co-authored-by: Bartosz Sokorski <b.sokorski@gmail.com>
Co-authored-by: Bjorn Neergaard <bjorn@neersighted.com>

Co-authored-by: Bartosz Sokorski <b.sokorski@gmail.com>