add note about paid plans to python qs

Author: devalog

fern/products/sdks/overview/python/quickstart.mdx

@@ -58,5 +58,9 @@ sdks/ # created by fern generate --group sdk
         ├─ errors/
         └─ types/
 ```
-  
+
+<Note>Some files, including `pyproject.toml` and `README.md`, are only generated on paid plans.
+To get the fully generated SDK, schedule a 
+  [demo](https://buildwithfern.com/contact) or [email
+  us](mailto:[email protected]).</Note>  
 </Steps>