feat(cody_py): improve chat response formatting

- Modify CodyAgent.send_chat() to return just the response string
- Update main.py to print chat responses with "Assistant: " prefix
- Add BLUE color code import in main.py for response formatting

The changes aim to enhance the formatting and readability of chat responses
from the CodyAgent. The response is now printed with a consistent "Assistant: "
prefix, making it easier to distinguish from user input. The BLUE color code
is also imported and used for the prefix to improve visual clarity.

codypy/cody_py.py

@@ -411,7 +411,7 @@ async def chat(
         show_context_files: bool = False,
         context_files=None,
         is_debugging: bool = False,
-    ) -> str:
+    ):
         """
         Sends a chat message to the Cody server and returns the response.
 
@@ -462,7 +462,7 @@ async def chat(
             return f"{RED}--- Failed to submit chat message ---{RESET}"
         debug_method_map["webview/postMessage"] = True
         return (
-            f"{BLUE}{speaker.capitalize()}{RESET}: {response}\n",
+            response,
             context_files_response,
         )
 

main.py

@@ -5,7 +5,7 @@
 
 from codypy.client_info import AgentSpecs, Models
 from codypy.cody_py import CodyAgent, CodyServer
-from codypy.config import GREEN, RESET, YELLOW  # , debug_method_map
+from codypy.config import BLUE, GREEN, RESET, YELLOW  # , debug_method_map
 from codypy.context import append_paths
 from codypy.logger import log_message, setup_logger
 
@@ -97,7 +97,7 @@ async def main():
         )
         if response == "":
             break
-        print(response)
+        print(f"{BLUE}Assistant{RESET}: {response}\n")
         print("--- Context Files ---")
         if context_files_response:
             for context in context_files_response: