Add LLM chat history widget

[christian-byrne]

Adds display_component websocket message for custom nodes to display Vue components by name at any point during execution, while also passing props.

Adds DOM widget for displaying LLM chat history, allowing you to view the entire chat history of a particular node instance and additionally return to previous points in the conversation.

Can be used from python node code like:

class ExampleNode:
      @classmethod
      def INPUT_TYPES(cls) -> InputTypeDict:
          return {
              "hidden": {
  
                  "unique_id": "UNIQUE_ID",
              },
          }
    FUNCTION="f"
    def f(self, unique_id):
        render_spec = {
            "node_id": unique_id,
            "component": "VueComponentName",
            "props": {
                "key": "set a new key to avoid replacing the existing component",
                "class" : "text-xs dark-theme:bg-transparent",
                "primevue prop name" : "primevue prop value"
            }
        }
        PromptServer.instance.send_sync(
            "display_component",
            render_spec,
        )

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