Add conversion support for IQuestCoderForCausalLM (#18524)

convert_hf_to_gguf.py

@@ -2492,6 +2492,7 @@ class StableLMModel(TextModel):
     "VLlama3ForCausalLM",
     "LlavaForConditionalGeneration",
     "VoxtralForConditionalGeneration",
+    "IQuestCoderForCausalLM",
     "LlamaModel")
 class LlamaModel(TextModel):
     model_arch = gguf.MODEL_ARCH.LLAMA