HunyuanVideo: Add missing features (negative prompt and LLM template)

[JohnSmithToYou]

Feature Idea

I would like to switch from ComfyUI-HunyuanVideoWrapper to the standard ComfyUI nodes BUT there are two missing features:

1. The ability to use negative prompts (this works well in the wrapper)
2. The ability to disable HunyuanVideo's LLM used to edit prompts (or change the prompt template but I don't use that).
   Both of these features give total control of the video generation.

Existing Solutions

Unless I'm mistaken, there doesn't seem to be any way except to use the ComfyUI-HunyuanVideoWrapper but I can't take advantage of other custom nodes then.

Other

No response