Added support for DeepSeek-Chat

[Rsplwe]

No description provided.

[JusticeRage]

Hi! Thanks for the PR! Looking at the code, it looks like a lot of code is duplicated from the OpenAI model classes. Implementing DeepSeek as a subclass of GPT should be a better way to go about this since the APIs are compatible.
I will look into this shortly!

[Rsplwe]

OK, now DeepSeek has been implemented as a subclass of GPT

[JusticeRage]

Thanks! One last thing I think may be missing is that there doesn't seem to be a default URL for the DeepSeek endpoint.
If I recall correctly the get_config function can provide a default value if nothing is found in the config or environment variables.
Then I'll test that ASAP and merge, hopefully tonight!

[Rsplwe]

Added default api url

[Rsplwe]

Due to platform maintenance, the API is currently unavailable.

https://status.deepseek.com/

[JusticeRage]

The API platform still seems to be down. I'll test your code as soon as I get an opportunity, thanks again for your patience!