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/gpu/alpha_comp.cpp

@@ -0,0 +1,68 @@
+#include <iostream>
+
+#include "opencv2/core/opengl.hpp"
+#include "opencv2/highgui.hpp"
+#include "opencv2/cudaimgproc.hpp"
+
+using namespace std;
+using namespace cv;
+using namespace cv::cuda;
+
+int main()
+{
+    cout << "This program demonstrates using alphaComp" << endl;
+    cout << "Press SPACE to change compositing operation" << endl;
+    cout << "Press ESC to exit" << endl;
+
+    namedWindow("First Image", WINDOW_NORMAL);
+    namedWindow("Second Image", WINDOW_NORMAL);
+    namedWindow("Result", WINDOW_OPENGL);
+
+    setGlDevice();
+
+    Mat src1(640, 480, CV_8UC4, Scalar::all(0));
+    Mat src2(640, 480, CV_8UC4, Scalar::all(0));
+
+    rectangle(src1, Rect(50, 50, 200, 200), Scalar(0, 0, 255, 128), 30);
+    rectangle(src2, Rect(100, 100, 200, 200), Scalar(255, 0, 0, 128), 30);
+
+    GpuMat d_src1(src1);
+    GpuMat d_src2(src2);
+
+    GpuMat d_res;
+
+    imshow("First Image", src1);
+    imshow("Second Image", src2);
+
+    int alpha_op = ALPHA_OVER;
+
+    const char* op_names[] =
+    {
+        "ALPHA_OVER", "ALPHA_IN", "ALPHA_OUT", "ALPHA_ATOP", "ALPHA_XOR", "ALPHA_PLUS", "ALPHA_OVER_PREMUL", "ALPHA_IN_PREMUL", "ALPHA_OUT_PREMUL",
+        "ALPHA_ATOP_PREMUL", "ALPHA_XOR_PREMUL", "ALPHA_PLUS_PREMUL", "ALPHA_PREMUL"
+    };
+
+    for(;;)
+    {
+        cout << op_names[alpha_op] << endl;
+
+        alphaComp(d_src1, d_src2, d_res, alpha_op);
+
+        imshow("Result", d_res);
+
+        char key = static_cast<char>(waitKey());
+
+        if (key == 27)
+            break;
+
+        if (key == 32)
+        {
+            ++alpha_op;
+
+            if (alpha_op > ALPHA_PREMUL)
+                alpha_op = ALPHA_OVER;
+        }
+    }
+
+    return 0;
+}