Port mdmd from mainline + Qwen2/2.5-VL support (#798)

* Add mtmd: the beginning

* Add mtmd: mtmd.cpp compiles

* Add mtmd: clip initialization compiles

* Add mtmd: clip.cpp compiles

* Add mtmd: builds successfully

* Add CPU implementation for GGML_OP_GLU

* Add CUDA implementation for GGML_OP_GLU

* Add CPU implementation for GGML_OP_CONV_2D and GGML_OP_CONV_2D_DW

* Add CUDA implementation for GGML_OP_CONV_2D and GGML_OP_CONV_2D_DW

* Add mtmd: refresh CPU rope

* Add mtmd: refresh CUDA rope

* Add mtmd: add Qwen2-VL

* Add mtmd: Qwen2.5-VL text seems to work with this change

* Add mtmd: fix swiglu

* Add mtmd: use LOG_TEE so generated tokens show up in terminal

* Add mtmd: do not attempt to load a GPU backend if none are available

* GLU, not GPU

* Fix typo

* Fix new/free mismatch

* LOG stuff

* Add mtmd: this fixes gibberish on second image

---------

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

examples/mtmd/CMakeLists.txt

@@ -0,0 +1,62 @@
+# mtmd
+
+find_package(Threads REQUIRED)
+
+add_library(mtmd
+            mtmd.cpp
+            mtmd-audio.cpp
+            mtmd.h
+            clip.cpp
+            clip.h
+            clip-impl.h
+            mtmd-helper.cpp
+            mtmd-helper.h
+            )
+
+target_link_libraries     (mtmd PUBLIC ggml llama)
+target_link_libraries     (mtmd PRIVATE Threads::Threads)
+target_include_directories(mtmd PUBLIC  .)
+target_include_directories(mtmd PRIVATE ../..)
+target_include_directories(mtmd PRIVATE ../../vendor)
+target_compile_features   (mtmd PRIVATE cxx_std_17)
+
+if (BUILD_SHARED_LIBS)
+    set_target_properties     (mtmd PROPERTIES POSITION_INDEPENDENT_CODE ON)
+    target_compile_definitions(mtmd PRIVATE LLAMA_BUILD)
+    target_compile_definitions(mtmd PUBLIC  LLAMA_SHARED)
+endif()
+
+set(MTMD_PUBLIC_HEADERS
+    ${CMAKE_CURRENT_SOURCE_DIR}/mtmd.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/mtmd-helper.h
+    )
+
+set_target_properties(mtmd
+    PROPERTIES
+    PUBLIC_HEADER "${MTMD_PUBLIC_HEADERS}")
+
+install(TARGETS mtmd LIBRARY PUBLIC_HEADER)
+
+if (NOT MSVC)
+    # for stb_image.h and miniaudio.h
+    target_compile_options(mtmd PRIVATE -Wno-cast-qual)
+endif()
+
+if (TARGET BUILD_INFO)
+    add_dependencies(mtmd        BUILD_INFO)
+    add_dependencies(mtmd-helper BUILD_INFO)
+endif()
+
+add_executable(llama-llava-cli    deprecation-warning.cpp)
+add_executable(llama-gemma3-cli   deprecation-warning.cpp)
+add_executable(llama-minicpmv-cli deprecation-warning.cpp)
+add_executable(llama-qwen2vl-cli  deprecation-warning.cpp)
+
+set(TARGET llama-mtmd-cli)
+add_executable         (${TARGET} mtmd-cli.cpp)
+set_target_properties  (${TARGET} PROPERTIES OUTPUT_NAME llama-mtmd-cli)
+if(LLAMA_TOOLS_INSTALL)
+    install(TARGETS ${TARGET} RUNTIME)
+endif()
+target_link_libraries  (${TARGET} PRIVATE common mtmd Threads::Threads)
+target_compile_features(${TARGET} PRIVATE cxx_std_17)