The aenum dependency didn't provide any specific improvements over the
stdlib's enum module.
aenum also doesn't provide typing information at the moment.
This removes one dependency and will help for completing the typing of
the generated client.
* python: improve type generation with more specific typing
* Annotate function parameters
* Remove unused imports
* remove unused files
* remove temporary hack
* remove lock file
* fix Annotated import
* support Python 3.7
* Regenerate code with typing-extensions
* Fix setup.py
* More Pydantic v2 compatibility
* depend on pydantic v2
* fix client_echo tests
* fix JSON serialization
* Fix references
* Skip circular dependency tests for now
* Temporarily hide the "float" property
The "float" property aliases the "float" type and completely breaks the
model: all the properties that were "float" now become the type of the
"float" property instead.
* Fix errors
* Import Literal from typing_extensions
* Fix GitHub Action workflows
* Fix Python 3.7 failure
* Fix quotes
* Apply suggestions from code review
* Fix tests
* split model imports from other modules imports
* fix workflow
* Comment the array unique items convertion, remove set translation
* Replace alias usage
