feat(poetry): add plugin to provide completion for Poetry (#10595)

plugins/poetry/README.md

@@ -0,0 +1,9 @@
+# Poetry Plugin
+
+This plugin automatically installs [Poetry](https://python-poetry.org/)'s completions for you, and keeps them up to date as your Poetry version changes.
+
+To use it, add `poetry` to the plugins array in your zshrc file:
+
+```zsh
+plugins=(... poetry)
+```