Add support for SmolLM3 (#934)

* Convert from HF

* Model loading and compute graph

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Co-authored-by: Iwan Kawrakow <iwan.kawrakow@gmail.com>

src/llama.cpp

@@ -4642,6 +4642,7 @@ enum llama_rope_type llama_rope_type(const struct llama_model * model) {
         case LLM_ARCH_COHERE2:
         case LLM_ARCH_ERNIE4_5:
         case LLM_ARCH_ERNIE4_5_MOE:
+        case LLM_ARCH_SMOLLM3:
             return LLAMA_ROPE_TYPE_NORM;
 
         // the pairs of head values are offset by n_rot/2