* Add enum support when building default values for model properties
* Update enum handling for Python for enum references
* Remove unused method
* Update mustaches for FastAPI, Pydantic, and Python for default values
* Address PR feedback and rebase main
* Remove old 2_0 samples
* adopt python3.5+ syntax
removing some residual python2 code, since it is not supported anymore, like:
- no need for `six` anymore
- no need for encoding utf8 in top file
- remove `object` inheritance in base model
- remove absolute import `__future__`
* generate samples
applying the new templates
* update python ignore pattern
ignore all the `.venv` folders
* Remove trailing underscore in security_controller_.py and base_model_.py
* Regenerating sample files
* Clean-up files with trailing underscore in samples
* Update security extension to use the new security_controller
* Regenerate unmaintained samples
