docs(code_quality.md): add doc on litellm code qa

docs/my-website/docs/extras/code_quality.md

@@ -0,0 +1,12 @@
+# Code Quality
+
+🚅 LiteLLM follows the [Google Python Style Guide](https://google.github.io/styleguide/pyguide.html).
+
+We run: 
+- Ruff for [formatting and linting checks](https://github.com/BerriAI/litellm/blob/e19bb55e3b4c6a858b6e364302ebbf6633a51de5/.circleci/config.yml#L320)
+- Mypy + Pyright for typing [1](https://github.com/BerriAI/litellm/blob/e19bb55e3b4c6a858b6e364302ebbf6633a51de5/.circleci/config.yml#L90), [2](https://github.com/BerriAI/litellm/blob/e19bb55e3b4c6a858b6e364302ebbf6633a51de5/.pre-commit-config.yaml#L4)
+- Black for [formatting](https://github.com/BerriAI/litellm/blob/e19bb55e3b4c6a858b6e364302ebbf6633a51de5/.circleci/config.yml#L79)
+- isort for [import sorting](https://github.com/BerriAI/litellm/blob/e19bb55e3b4c6a858b6e364302ebbf6633a51de5/.pre-commit-config.yaml#L10)
+
+
+If you have suggestions on how to improve the code quality feel free to open an issue or a PR.

docs/my-website/sidebars.js

@@ -306,6 +306,7 @@ const sidebars = {
         "migration_policy",
         "contributing",
         "proxy/pii_masking",
+        "extras/code_quality",
         "rules",
         "proxy_server",
         {