Brandon/eng 266 conversation crew v1 (#1843)

* worked on foundation for new conversational crews. Now going to work on chatting.

* core loop should be working and ready for testing.

* high level chat working

* its alive!!

* Added in Joaos feedback to steer crew chats back towards the purpose of the crew

* properly return tool call result

* accessing crew directly instead of through uv commands

* everything is working for conversation now

* Fix linting

* fix llm_utils.py and other type errors

* fix more type errors

* fixing type error

* More fixing of types

* fix failing tests

* Fix more failing tests

* adding tests. cleaing up pr.

* improve

* drop old functions

* improve type hintings

src/crewai/types/crew_chat.py

@@ -0,0 +1,40 @@
+from typing import List
+
+from pydantic import BaseModel, Field
+
+
+class ChatInputField(BaseModel):
+    """
+    Represents a single required input for the crew, with a name and short description.
+    Example:
+        {
+            "name": "topic",
+            "description": "The topic to focus on for the conversation"
+        }
+    """
+
+    name: str = Field(..., description="The name of the input field")
+    description: str = Field(..., description="A short description of the input field")
+
+
+class ChatInputs(BaseModel):
+    """
+    Holds a high-level crew_description plus a list of ChatInputFields.
+    Example:
+        {
+            "crew_name": "topic-based-qa",
+            "crew_description": "Use this crew for topic-based Q&A",
+            "inputs": [
+                {"name": "topic", "description": "The topic to focus on"},
+                {"name": "username", "description": "Name of the user"},
+            ]
+        }
+    """
+
+    crew_name: str = Field(..., description="The name of the crew")
+    crew_description: str = Field(
+        ..., description="A description of the crew's purpose"
+    )
+    inputs: List[ChatInputField] = Field(
+        default_factory=list, description="A list of input fields for the crew"
+    )