Add streaming support to Groq provider and implement generate_stream_text method

simplemind/providers/groq.py

@@ -24,6 +24,7 @@ class Groq(BaseProvider):
     NAME = PROVIDER_NAME
     DEFAULT_MODEL = DEFAULT_MODEL
     DEFAULT_KWARGS = DEFAULT_KWARGS
+    supports_streaming = True
 
     def __init__(self, api_key: str | None = None):
         self.api_key = api_key or settings.get_api_key(PROVIDER_NAME)
@@ -111,3 +112,32 @@ class Groq(BaseProvider):
         )
 
         return str(response.choices[0].message.content)
+
+    @logger
+    def generate_stream_text(
+        self,
+        prompt: str,
+        *,
+        llm_model: str | None = None,
+        **kwargs,
+    ) -> str:
+        """Generate streaming text using the Groq API."""
+        messages = [
+            {"role": "user", "content": prompt},
+        ]
+
+        response = self.client.chat.completions.create(
+            messages=messages,
+            model=llm_model or self.DEFAULT_MODEL,
+            stream=True,
+            **{**self.DEFAULT_KWARGS, **kwargs},
+        )
+
+        try:
+            for chunk in response:
+                if chunk.choices and chunk.choices[0].delta.content:
+                    yield chunk.choices[0].delta.content
+        except Exception as e:
+            raise RuntimeError(
+                f"Failed to generate streaming text with Groq API: {e}"
+            ) from e