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/doc/js_tutorials/js_dnn/js_image_classification/js_image_classification.markdown

@@ -0,0 +1,13 @@
+Image Classification Example {#tutorial_js_image_classification}
+=======================================
+
+Goal
+----
+
+- In this tutorial you will learn how to use OpenCV.js dnn module for image classification.
+
+\htmlonly
+<iframe src="../../js_image_classification.html" width="100%"
+        onload="this.style.height=this.contentDocument.body.scrollHeight +'px';">
+</iframe>
+\endhtmlonly

3rdparty/opencv-4.5.4/doc/js_tutorials/js_dnn/js_image_classification/js_image_classification_with_camera.markdown

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+Image Classification Example with Camera {#tutorial_js_image_classification_with_camera}
+=======================================
+
+Goal
+----
+
+- In this tutorial you will learn how to use OpenCV.js dnn module for image classification example with camera.
+
+@note  If you don't know how to capture video from camera, please review @ref tutorial_js_video_display.
+
+\htmlonly
+<iframe src="../../js_image_classification_with_camera.html" width="100%"
+        onload="this.style.height=this.contentDocument.body.scrollHeight +'px';">
+</iframe>
+\endhtmlonly

3rdparty/opencv-4.5.4/doc/js_tutorials/js_dnn/js_object_detection/js_object_detection.markdown

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+Object Detection Example {#tutorial_js_object_detection}
+=======================================
+
+Goal
+----
+
+- In this tutorial you will learn how to use OpenCV.js dnn module for object detection.
+
+\htmlonly
+<iframe src="../../js_object_detection.html" width="100%"
+        onload="this.style.height=this.contentDocument.body.scrollHeight +'px';">
+</iframe>
+\endhtmlonly

3rdparty/opencv-4.5.4/doc/js_tutorials/js_dnn/js_object_detection/js_object_detection_with_camera.markdown

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+Object Detection Example with Camera{#tutorial_js_object_detection_with_camera}
+=======================================
+
+Goal
+----
+
+- In this tutorial you will learn how to use OpenCV.js dnn module for object detection with camera.
+
+\htmlonly
+<iframe src="../../js_object_detection_with_camera.html" width="100%"
+        onload="this.style.height=this.contentDocument.body.scrollHeight +'px';">
+</iframe>
+\endhtmlonly

3rdparty/opencv-4.5.4/doc/js_tutorials/js_dnn/js_pose_estimation/js_pose_estimation.markdown

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+Pose Estimation Example {#tutorial_js_pose_estimation}
+=======================================
+
+Goal
+----
+
+- In this tutorial you will learn how to use OpenCV.js dnn module for pose estimation.
+
+\htmlonly
+<iframe src="../../js_pose_estimation.html" width="100%"
+        onload="this.style.height=this.contentDocument.body.scrollHeight +'px';">
+</iframe>
+\endhtmlonly

3rdparty/opencv-4.5.4/doc/js_tutorials/js_dnn/js_semantic_segmentation/js_semantic_segmentation.markdown

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+Semantic Segmentation Example {#tutorial_js_semantic_segmentation}
+=======================================
+
+Goal
+----
+
+- In this tutorial you will learn how to use OpenCV.js dnn module for semantic segmentation.
+
+\htmlonly
+<iframe src="../../js_semantic_segmentation.html" width="100%"
+        onload="this.style.height=this.contentDocument.body.scrollHeight +'px';">
+</iframe>
+\endhtmlonly

3rdparty/opencv-4.5.4/doc/js_tutorials/js_dnn/js_style_transfer/js_style_transfer.markdown

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+Style Transfer Example {#tutorial_js_style_transfer}
+=======================================
+
+Goal
+----
+
+- In this tutorial you will learn how to use OpenCV.js dnn module for style transfer.
+
+\htmlonly
+<iframe src="../../js_style_transfer.html" width="100%"
+        onload="this.style.height=this.contentDocument.body.scrollHeight +'px';">
+</iframe>
+\endhtmlonly

3rdparty/opencv-4.5.4/doc/js_tutorials/js_dnn/js_table_of_contents_dnn.markdown

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+Deep Neural Networks (dnn module) {#tutorial_js_table_of_contents_dnn}
+============
+
+-   @subpage tutorial_js_image_classification
+
+    Image classification example
+
+-   @subpage tutorial_js_image_classification_with_camera
+
+    Image classification example with camera
+
+-   @subpage tutorial_js_object_detection
+
+    Object detection example
+
+-   @subpage tutorial_js_object_detection_with_camera
+
+    Object detection example with camera
+
+-   @subpage tutorial_js_semantic_segmentation
+
+    Semantic segmentation example
+
+-   @subpage tutorial_js_style_transfer
+
+    Style transfer example
+
+-   @subpage tutorial_js_pose_estimation
+
+    Pose estimation example