tooling(hook): add a check against docstring convention

Author: Guts

.pre-commit-config.yaml

@@ -65,10 +65,13 @@ repos:
     rev: 7.0.0
     hooks:
       - id: flake8
+        additional_dependencies:
+          - flake8-docstrings<2
         language: python
         args:
           - --config=setup.cfg
           - --select=E9,F63,F7,F82
+          - --docstring-convention=google
 
 ci:
   autofix_prs: true