model : add KORMo model (#18032)

* vocab: add KORMo Tokenizer

* model: add KORMoForCausalLM

* vocab: change pretokenizer to qwen2

* lint: fix unintended line removal

* model: make qwen2 bias tensor optional

* model: use qwen2 architecture for KORMo

convert_hf_to_gguf.py

@@ -1203,6 +1203,9 @@ class TextModel(ModelBase):
         if chkhsh == "f4f37b6c8eb9ea29b3eac6bb8c8487c5ab7885f8d8022e67edc1c68ce8403e95":
             # ref: https://huggingface.co/MiniMaxAI/MiniMax-M2
             res = "minimax-m2"
+        if chkhsh == "4a2e2abae11ca2b86d570fc5b44be4d5eb5e72cc8f22dd136a94b37da83ab665":
+            # ref: https://huggingface.co/KORMo-Team/KORMo-tokenizer
+            res = "kormo"
 
         if res is None:
             logger.warning("\n")
@@ -3398,7 +3401,7 @@ class QwenModel(TextModel):
         self._set_vocab_qwen()
 
 
-@ModelBase.register("Qwen2Model", "Qwen2ForCausalLM", "Qwen2AudioForConditionalGeneration")
+@ModelBase.register("Qwen2Model", "Qwen2ForCausalLM", "Qwen2AudioForConditionalGeneration", "KORMoForCausalLM")
 class Qwen2Model(TextModel):
     model_arch = gguf.MODEL_ARCH.QWEN2