fixing chat history

[wayruben]

{
"messages": [],
"response": {
"role": "whateverRole",
"content": "the actual response string"
}
}

it is for the plug/template chat to manage properly messages array so it will fit into LLM context.
In chat we simply return it as received.

Important: messages is an actual array with messages objects, objects that DO NOT have same structure between different LLM's hence when main chat LLM changes we need to clear history