* update gguf doc, config and tensor mapping * add qwen2moe architecture support, GGUFQwen2MoeConverter and q4 unit tests * apply code style fixes * reformat files * assign GGUFQwen2Converter to qwen2_moe
* update gguf doc, config and tensor mapping * add qwen2moe architecture support, GGUFQwen2MoeConverter and q4 unit tests * apply code style fixes * reformat files * assign GGUFQwen2Converter to qwen2_moe