adds pre-commit configuration including yapf

can be set up using `pre-commit install`

.pre-commit-config.yaml

+repos:
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.3.0
+    hooks:
+    -   id: check-yaml
+    -   id: double-quote-string-fixer
+    -   id: end-of-file-fixer
+    -   id: trailing-whitespace
+    -   id: check-ast
+-   repo: https://github.com/PyCQA/docformatter
+    rev: v1.4
+    hooks:
+    - id: docformatter
+      args: [--in-place, --wrap-summaries=80, --wrap-descriptions=80, --pre-summary-newline]
+-   repo: https://github.com/pre-commit/mirrors-yapf
+    rev: v0.32.0
+    hooks:
+    -   id: yapf

.style.yapf

+[style]
+based_on_style = google
+dedent_closing_brackets = true
+coalesce_brackets = true
+split_all_top_level_comma_separated_values = true