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/compatibility/compatibility_test.cpp

@@ -0,0 +1,19 @@
+#include <iostream>
+
+#include <opencv2/core.hpp>
+
+#include <opencv2/imgcodecs/legacy/constants_c.h>
+#include <opencv2/videoio/legacy/constants_c.h>
+#include <opencv2/photo/legacy/constants_c.h>
+#include <opencv2/video/legacy/constants_c.h>
+
+using namespace cv;
+
+int main(int /*argc*/, const char** /*argv*/)
+{
+    std::cout
+        << (int)CV_LOAD_IMAGE_GRAYSCALE
+        << (int)CV_CAP_FFMPEG
+        << std::endl;
+    return 0;
+}