feat(poetry-env): create plugin (#11069)

plugins/poetry-env/README.md

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+# Poetry Environment Plugin
+
+This plugin automatically changes poetry environment when you cd into or out of the project directory. 
+Note: Script looks for pyproject.toml file to determine poetry if its a poetry environment
+
+To use it, add `poetry-env` to the plugins array in your zshrc file:
+
+```zsh
+plugins=(... poetry-env)
+```