[Feature] Is there any chance to support unsloth's IQ1, IQ2 quantized DeepSeek 0528 and V3.1 models ?

### Checklist

- [x] 1. If the issue you raised is not a feature but a question, please raise a discussion at https://github.com/kvcache-ai/ktransformers/discussions. Otherwise, it will be closed.
- [x] 2. To help the community, I will use Chinese/English or attach an Chinese/English translation if using another language. Non-English/Chinese content without translation may be closed.

### Motivation

I have tried running unsloth's DeepSeek-R1-0528-IQ2_XXS and DeepSeek-V3.1-IQ2_M using KT. Both models are not fully supported by KT yet where errors will be raised if one run them using KT. I only have a desktop computer with 256GB DDR5 memory. Thank you very much if you could reach me soon.

### Related resources

_No response_

No source files, tests, or entry points are named. Start by reproducing the reported errors with the unsloth DeepSeek-R1-0528-IQ2_XXS and DeepSeek-V3.1-IQ2_M models, then trace the unsupported paths. Done means both models run successfully in KT.

Written by the indexing model from the issue text.