OpenAIClient: implement close()

[stargazer33]

The com.openai.client.OpenAIClient has no close() method.
Please implement it!
Better: implement AutoClosable

Additional info:
com.openai.client.okhttp.OkHttpClient has public void close()

Running my code using OpenAIClient I get (sometimes) this text in log:

okhttp3.OkHttpClient           A connection to <url> was leaked. Did you forget to close a response body? To see where this was allocated, set the OkHttpClient logger level to FINE: Logger.getLogger(OkHttpClient.class.getName()).setLevel(Level.FINE);

It can be that my code is not correct: having OpenAIClient.close() would prevent this.