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/cpp/tutorial_code/introduction/display_image/display_image.cpp

@@ -0,0 +1,39 @@
+//! [includes]
+#include <opencv2/core.hpp>
+#include <opencv2/imgcodecs.hpp>
+#include <opencv2/highgui.hpp>
+
+#include <iostream>
+
+using namespace cv;
+//! [includes]
+
+int main()
+{
+    //! [imread]
+    std::string image_path = samples::findFile("starry_night.jpg");
+    Mat img = imread(image_path, IMREAD_COLOR);
+    //! [imread]
+
+    //! [empty]
+    if(img.empty())
+    {
+        std::cout << "Could not read the image: " << image_path << std::endl;
+        return 1;
+    }
+    //! [empty]
+
+    //! [imshow]
+    imshow("Display window", img);
+    int k = waitKey(0); // Wait for a keystroke in the window
+    //! [imshow]
+
+    //! [imsave]
+    if(k == 's')
+    {
+        imwrite("starry_night.png", img);
+    }
+    //! [imsave]
+
+    return 0;
+}

3rdparty/opencv-4.5.4/samples/cpp/tutorial_code/introduction/documentation/documentation.cpp

@@ -0,0 +1,14 @@
+#include <iostream>
+
+/**
+ * @function main
+ * @brief Main function
+ */
+int main( void )
+{
+    //! [hello_world]
+    std::cout << "Hello World!";
+    //! [hello_world]
+
+    return 0;
+}

3rdparty/opencv-4.5.4/samples/cpp/tutorial_code/introduction/windows_visual_studio_opencv/introduction_windows_vs.cpp

@@ -0,0 +1,31 @@
+#include <opencv2/core.hpp>
+#include <opencv2/imgcodecs.hpp>
+#include <opencv2/highgui.hpp>
+#include <iostream>
+
+using namespace cv;
+using namespace std;
+
+int main( int argc, char** argv )
+{
+    if( argc != 2)
+    {
+     cout <<" Usage: " << argv[0] << " ImageToLoadAndDisplay" << endl;
+     return -1;
+    }
+
+    Mat image;
+    image = imread(argv[1], IMREAD_COLOR); // Read the file
+
+    if( image.empty() ) // Check for invalid input
+    {
+        cout << "Could not open or find the image" << std::endl ;
+        return -1;
+    }
+
+    namedWindow( "Display window", WINDOW_AUTOSIZE ); // Create a window for display.
+    imshow( "Display window", image ); // Show our image inside it.
+
+    waitKey(0); // Wait for a keystroke in the window
+    return 0;
+}