fix: Extract tokenizer from GGUF for Qwen3 and Gemma3 arch (#1011)

That avoids passing the `--model-config` param to dynamo-run when using llamacpp.

docs/guides/dynamo_run.md

@@ -201,13 +201,12 @@ cargo build --features llamacpp[,cuda|metal|vulkan] -p dynamo-run
 ```
 
 ```
-dynamo-run out=llamacpp ~/llms/Llama-3.2-3B-Instruct-Q6_K.gguf
+dynamo-run out=llamacpp ~/llms/gemma-3-1b-it-q4_0.gguf
+dynamo-run out=llamacpp ~/llms/Qwen3-0.6B-Q8_0.gguf # From https://huggingface.co/ggml-org
 ```
 
 Note that in some cases we are unable to extract the tokenizer from the GGUF, and so a Hugging Face checkout of a matching model must also be passed. Dynamo will use the weights from the GGUF and the pre-processor (`tokenizer.json`, etc) from the `--model-config`:
 ```
-dynamo-run out=llamacpp ~/llms/gemma-3-1b-it-q4_0.gguf --model-config ~/llms/gemma-3-1b-it
-
 dynamo-run out=llamacpp ~/llms/Llama-4-Scout-17B-16E-Instruct-UD-IQ1_S.gguf --model-config ~/llms/Llama-4-Scout-17B-16E-Instruct
 ```
 

lib/llm/src/gguf.rs

@@ -56,6 +56,8 @@ pub enum GGUFArchitecture {
     Phi3,
     Starcoder2,
     Qwen2,
+    Qwen3,
+    Gemma3,
 }
 
 // Wraps from_str() for some convenience: