Support for NVFP4 and make user aware about model compatability

I wanted to try this model: https://huggingface.co/unsloth/Qwen3.6-27B-NVFP4 Took a little while to install, only for it to complain "No .gguf models found in directory" when attempting to load. It would be really nice if the UI could just tell me what models it can or can't run. Like if it can't run NVFP4, or other things. So I know not to waste my time downloading a model.