feat: 切换后端至PaddleOCR-NCNN，切换工程为CMake

1.项目后端整体迁移至PaddleOCR-NCNN算法，已通过基本的兼容性测试
2.工程改为使用CMake组织，后续为了更好地兼容第三方库，不再提供QMake工程
3.重整权利声明文件，重整代码工程，确保最小化侵权风险

Log: 切换后端至PaddleOCR-NCNN，切换工程为CMake
Change-Id: I4d5d2c5d37505a4a24b389b1a4c5d12f17bfa38c

3rdparty/opencv-4.5.4/samples/semihosting/histogram/CMakeLists.txt

@@ -0,0 +1,26 @@
+# This file is part of OpenCV project.
+# It is subject to the license terms in the LICENSE file found in the top-level directory
+# of this distribution and at http://opencv.org/license.html
+
+set(PROJECT_NAME histogram)
+project(${PROJECT_NAME})
+
+ocv_install_example_src(histogram *.cpp *.hpp CMakeLists.txt)
+
+set(LOCAL_DEPS
+  opencv_core
+  opencv_imgproc
+  ${OPENCV_MODULES_PUBLIC}
+  ${OpenCV_LIB_COMPONENTS})
+ocv_check_dependencies(${LOCAL_DEPS})
+
+if(NOT OCV_DEPENDENCIES_FOUND)
+  return()
+endif()
+
+ocv_define_sample(histogram histogram.cpp ${SEMIHOSTING_SUFFIX})
+ocv_include_modules_recurse(${LOCAL_DEPS})
+target_include_directories(${histogram} PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
+target_include_directories(${histogram} PRIVATE ${RAW_PIXEL_INCLUDE})
+ocv_target_link_libraries(${histogram} PRIVATE ${OPENCV_LINKER_LIBS}
+  ${LOCAL_DEPS})