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/platforms/semihosting/include/aarch64_semihosting_port.hpp

@@ -0,0 +1,42 @@
+// 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.
+
+#ifndef AARCH64_BAREMETAL_PORT_HPP
+#define AARCH64_BAREMETAL_PORT_HPP
+
+#include <malloc.h> // Needed for `memalign`.
+#include <sys/errno.h> // Needed for `ENOMEM`.
+
+// -std=c++11 is missing the following definitions when targeting
+// semihosting on aarch64.
+#if __cplusplus == 201103L
+#include <cmath>
+#define M_PI 3.14159265358979323846
+#define M_SQRT2 1.41421356237309504880
+
+namespace std {
+inline double cbrt(double x) {
+    return ::cbrt(x);
+}
+inline double copysign(double mag, double sgn) {
+    return ::copysign(mag, sgn);
+}
+} //namespace std
+#endif // __cplusplus == 201103L
+
+extern "C" {
+// Redirect the implementation of `posix_memalign` to `memalign`
+// as the former is
+// missing at link time. https://pubs.opengroup.org/onlinepubs/9699919799/functions/posix_memalign.html
+__attribute__((weak)) int posix_memalign(void **memptr, size_t alignment, size_t size) {
+    void * ptr =  memalign(alignment, size);
+    if (ptr != NULL) {
+        *memptr = ptr;
+        return 0;
+    }
+    return ENOMEM;
+}
+} // extern "C"
+
+#endif