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/python/opencv_version.py

@@ -0,0 +1,41 @@
+#!/usr/bin/env python
+
+'''
+prints OpenCV version
+
+Usage:
+    opencv_version.py [<params>]
+    params:
+        --build: print complete build info
+        --help:  print this help
+'''
+
+# Python 2/3 compatibility
+from __future__ import print_function
+
+import numpy as np
+import cv2 as cv
+
+def main():
+    import sys
+
+    try:
+        param = sys.argv[1]
+    except IndexError:
+        param = ""
+
+    if "--build" == param:
+        print(cv.getBuildInformation())
+    elif "--help" == param:
+        print("\t--build\n\t\tprint complete build info")
+        print("\t--help\n\t\tprint this help")
+    else:
+        print("Welcome to OpenCV")
+
+    print('Done')
+
+
+if __name__ == '__main__':
+    print(__doc__)
+    main()
+    cv.destroyAllWindows()