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/tutorial_code/highgui/trackbar/AddingImagesTrackbar.py

@@ -0,0 +1,48 @@
+from __future__ import print_function
+from __future__ import division
+import cv2 as cv
+import argparse
+
+alpha_slider_max = 100
+title_window = 'Linear Blend'
+
+## [on_trackbar]
+def on_trackbar(val):
+    alpha = val / alpha_slider_max
+    beta = ( 1.0 - alpha )
+    dst = cv.addWeighted(src1, alpha, src2, beta, 0.0)
+    cv.imshow(title_window, dst)
+## [on_trackbar]
+
+parser = argparse.ArgumentParser(description='Code for Adding a Trackbar to our applications tutorial.')
+parser.add_argument('--input1', help='Path to the first input image.', default='LinuxLogo.jpg')
+parser.add_argument('--input2', help='Path to the second input image.', default='WindowsLogo.jpg')
+args = parser.parse_args()
+
+## [load]
+# Read images ( both have to be of the same size and type )
+src1 = cv.imread(cv.samples.findFile(args.input1))
+src2 = cv.imread(cv.samples.findFile(args.input2))
+## [load]
+if src1 is None:
+    print('Could not open or find the image: ', args.input1)
+    exit(0)
+
+if src2 is None:
+    print('Could not open or find the image: ', args.input2)
+    exit(0)
+
+## [window]
+cv.namedWindow(title_window)
+## [window]
+
+## [create_trackbar]
+trackbar_name = 'Alpha x %d' % alpha_slider_max
+cv.createTrackbar(trackbar_name, title_window , 0, alpha_slider_max, on_trackbar)
+## [create_trackbar]
+
+# Show some stuff
+on_trackbar(0)
+
+# Wait until user press some key
+cv.waitKey()