Migrate to openai 1.0.0 or higher

[Ronan24]

If you follow the instructions and try the command python src/generate.py, we receive the following error :

File "D:<PATH>\pokemon-card-generator\src\util\gpt_call.py", line 32, in get_completion
response = openai.Completion.create(
^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:<PATH>\Python\Python312\Lib\site-packages\openai\lib_old_api.py", line 39, in call
raise APIRemovedInV1(symbol=self._symbol)
openai.lib._old_api.APIRemovedInV1:

You tried to access openai.Completion, but this is no longer supported in openai>=1.0.0 - see the README at https://github.com/openai/openai-python for the API.

The actual version installed by pip is 1.36.0 nowadays.