* [C] Don't convert post body strings to JSON
If the body provided for the api request is a just a string itself,
don't try to convert it to JSON, simply submit the string.
* [C] Implement BearerToken authentication
* [C] Handle nullable fields correctly
* [C] Fix implementation of FromString for enums
* [C] Update the test schemas to cover the changes
* Update samples
* Fix the updated samples
* [C] Add the new samples folder to the CI workflow
* [C] Add test schemas for the recent changes
The recent commit 47665aaa97cb ("Fix a few issues with the C generator
(part 1 version 2) (#14434)") didn't include any test schemas. Add them
now, as requested:
https://github.com/OpenAPITools/openapi-generator/pull/14434#issuecomment-2497497110
* Update samples
* Fix sample update with missing files
* More fixes for sample updates
