Catalog the created tox environments in a PEP 832 .python-envs file next to the configuration file, so that
editors such as VS Code or PyCharm offer them as interpreters instead of asking you for a path under .tox. The
default environment comes last, and tox prefers one named dev for that spot, then one that installs the project in
development mode, then the first of :ref:`env_list`. tox leaves the lines other tools wrote alone, and takes an
environment out of the catalog while it recreates it. Set :ref:`python_envs` to false to skip the file - by
:user:`gaborbernat`. (:issue:`4013`)