Button to save a conversation

[vnawrath]

As a qa engineer,
I want to be able to save a conversation,
So that I can refer to it later

AC

1. There's a button in the streamlit app that allows saving the conversation history
2. The conversation is saved as JSON messages to the folder/file described by the project/test case name

Notes

• The button should probably appear before we show the input for the user message

    # User message
    if last_message == None or last_message["role"] == "assistant":
        ## here
        with st.chat_message("user"):
            user_message_content = st.text_area(
                "User message content",
                "Let's write a test for a chat app. We should test a user can send a message.",
                key="user_message_content",
                label_visibility="collapsed",
            )
            if user_message_content:
                prompt_messages.append(HumanMessage(content=user_message_content))
            else:
                st.stop()

• The reasoning is we probably want to save the conversation after the assistant sent a message. We either save the conversation because we are done, or we write another prompt.