mtmd: add llama-mtmd-debug binary (#20508)

* mtmd: add llama-mtmd-debug binary

* adapt

* fixes

* fix compile error

* fix windows compile error

* rm legacy clip_debug_encode()

* add MTMD_API to fix build

tools/mtmd/debug/mtmd-debug.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include "mtmd.h"
+
+#include <vector>
+
+// INTERNAL HEADER FOR DEBUGGING PURPOSES ONLY
+// NOT INTENDED FOR PUBLIC USE
+// Do not raise issues related to this debugging API
+
+// encode take the pre-processed f32 values, print the intermidiate values via cb_eval callback
+MTMD_API void mtmd_debug_encode_image(mtmd_context * ctx, const std::vector<std::vector<float>> & image);
+MTMD_API void mtmd_debug_encode_audio(mtmd_context * ctx, const std::vector<float> & input); // will be broadcasted to fit n_mel
+
+// preprocess take the raw input values
+MTMD_API void mtmd_debug_preprocess_image(mtmd_context * ctx, const std::vector<uint8_t> & rgb_values, int nx, int ny);
+MTMD_API void mtmd_debug_preprocess_audio(mtmd_context * ctx, const std::vector<float> & pcm_samples);