The self.package_path is not documented

[uilianries]

We have a PR provided by @jellespijker which uses self.package_path which is implemented here: https://github.com/conan-io/conan/blob/200a7a13b05ba2872d95e0517265e60f1bb566f7/conans/model/conanfile_interface.py.

This is a good feature for who wants to use modern Pathlib, but it's not documented, which is considered as private.

[jellespijker]

I often use all the _path synonyms instead of the folder. Since it makes for shorter calls and gives access to glob() and exists() saving me an import os. I also think it makes things more readable.

I appreciated the PR :thumbsup:

[AbrilRBS]

We're deprecating these accesors, users are free to call Path(self.xxx_folder) on the recipes https://github.com/conan-io/conan/pull/16247