add test & docs

Author: ngxson

docs/multimodal.md

@@ -74,4 +74,7 @@ NOTE: some models may require large context window, for example: `-c 8192`
 (tool_name) -hf ggml-org/InternVL3-2B-Instruct-GGUF
 (tool_name) -hf ggml-org/InternVL3-8B-Instruct-GGUF
 (tool_name) -hf ggml-org/InternVL3-14B-Instruct-GGUF
+
+# Llama 4 Scout
+(tool_name) -hf ggml-org/Llama-4-Scout-17B-16E-Instruct-GGUF
 ```

tools/mtmd/tests.sh

@@ -64,6 +64,7 @@ if [ "$RUN_BIG_TESTS" = true ]; then
     add_test "llama-mtmd-cli"  "ggml-org/InternVL3-14B-Instruct-GGUF:Q4_K_M"
     # add_test "llama-mtmd-cli" "ggml-org/Qwen2.5-VL-32B-Instruct-GGUF:Q4_K_M" # does not work on my mac M3 Ultra
     # add_test "llama-mtmd-cli" "ggml-org/Qwen2.5-VL-72B-Instruct-GGUF:Q4_K_M" # too big
+    add_test "llama-mtmd-cli"  "ggml-org/Llama-4-Scout-17B-16E-Instruct-GGUF:IQ1_S" # too big
 fi
 
 # these models always give the wrong answer, not sure why