[Python] Add poetry.lock

Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.  This is especially recommended for binary packages to ensure reproducibility, and is more commonly ignored for libraries.

This is taken from https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control

Python.gitignore

@@ -94,6 +94,13 @@ ipython_config.py
 #   install all needed dependencies.
 #Pipfile.lock
 
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
 # PEP 582; used by e.g. github.com/David-OConnor/pyflow
 __pypackages__/