Monoranger completely breaks `poetry activate`

[mathrick]

Monoranger plugin prints extra things to stdout when poetry activate is called, which breaks it when it's used as intended and passed to the shell directly:

WITHOUT the plugin:

$ poetry env activate
source /home/mkatafiasz/.cache/pypoetry/virtualenvs/ssg-integrations-gcn-xRFQ2lR6-py3.12/bin/activate

WITH the plugin:

$ poetry env activate
Using monorepo root venv ssg

source /home/mkatafiasz/.cache/pypoetry/virtualenvs/ssg-legacy-util-C5a_7QdD-py3.12/bin/activate

$ $(poetry env activate)
Using: command not found