Can't run due to missing LLM and VLM nodes

[ycheng517]

All LLM and VLM nodes like gpt2_llm.py, clip_node.py are missing, therefore this repo can't be run at all. I feel I just wasted 2 hours setting the project up and fixing issues, only to find that required nodes are missing. There should be a big disclaimer on the main README saying that the repo is not ready.