feat(fine tuned models) enable access to fine tuned OpenAI models whi… (

#66)

Allow the use of fine-tuned OpenAI gpt 3.5 Turbo models which start with
ft:gpt, this is especially useful when trying to compare the stock
models against fine-tuned models quickly.

gptcli/assistant.py

@@ -56,7 +56,7 @@ class AssistantConfig(TypedDict, total=False):
 
 
 def get_completion_provider(model: str) -> CompletionProvider:
-    if model.startswith("gpt"):
+    if model.startswith("gpt") or model.startswith("ft:gpt"):
         return OpenAICompletionProvider()
     elif model.startswith("claude"):
         return AnthropicCompletionProvider()