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/install/linux_install_a.sh

@@ -0,0 +1,58 @@
+#!/bin/bash
+# This file contains documentation snippets for Linux installation tutorial
+if [ "$1" = "--check" ] ; then
+sudo()
+{
+    command $@
+}
+fi
+
+sudo apt update
+
+# [gcc]
+sudo apt install -y g++
+# [gcc]
+
+# [make]
+sudo apt install -y make
+# [make]
+
+# [cmake]
+sudo apt install -y cmake
+# [cmake]
+
+# [wget]
+sudo apt install -y wget unzip
+# [wget]
+
+# [download]
+wget -O opencv.zip https://github.com/opencv/opencv/archive/master.zip
+unzip opencv.zip
+mv opencv-master opencv
+# [download]
+
+# [prepare]
+mkdir -p build && cd build
+# [prepare]
+
+# [configure]
+cmake ../opencv
+# [configure]
+
+# [build]
+make -j4
+# [build]
+
+# [check]
+ls bin
+ls lib
+# [check]
+
+# [check cmake]
+ls OpenCVConfig*.cmake
+ls OpenCVModules.cmake
+# [check cmake]
+
+# [install]
+sudo make install
+# [install]

3rdparty/opencv-4.5.4/samples/install/linux_install_b.sh

@@ -0,0 +1,47 @@
+#!/bin/bash
+# This file contains documentation snippets for Linux installation tutorial
+if [ "$1" = "--check" ] ; then
+sudo()
+{
+    command $@
+}
+fi
+
+sudo apt update
+
+# [clang]
+sudo apt install -y clang
+# [clang]
+
+# [ninja]
+sudo apt install -y ninja-build
+# [ninja]
+
+# [cmake]
+sudo apt install -y cmake
+# [cmake]
+
+# [git]
+sudo apt install -y git
+# [git]
+
+# [download]
+git clone https://github.com/opencv/opencv.git
+git -C opencv checkout master
+# [download]
+
+# [prepare]
+mkdir -p build && cd build
+# [prepare]
+
+# [configure]
+cmake -GNinja ../opencv
+# [configure]
+
+# [build]
+ninja
+# [build]
+
+# [install]
+sudo ninja install
+# [install]

3rdparty/opencv-4.5.4/samples/install/linux_quick_install.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+# This file contains documentation snippets for Linux installation tutorial
+if [ "$1" = "--check" ] ; then
+sudo()
+{
+    command $@
+}
+fi
+
+# [body]
+# Install minimal prerequisites (Ubuntu 18.04 as reference)
+sudo apt update && sudo apt install -y cmake g++ wget unzip
+
+# Download and unpack sources
+wget -O opencv.zip https://github.com/opencv/opencv/archive/master.zip
+unzip opencv.zip
+
+# Create build directory
+mkdir -p build && cd build
+
+# Configure
+cmake  ../opencv-master
+
+# Build
+cmake --build .
+# [body]

3rdparty/opencv-4.5.4/samples/install/linux_quick_install_contrib.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+# This file contains documentation snippets for Linux installation tutorial
+if [ "$1" = "--check" ] ; then
+sudo()
+{
+    command $@
+}
+fi
+
+# [body]
+# Install minimal prerequisites (Ubuntu 18.04 as reference)
+sudo apt update && sudo apt install -y cmake g++ wget unzip
+
+# Download and unpack sources
+wget -O opencv.zip https://github.com/opencv/opencv/archive/master.zip
+wget -O opencv_contrib.zip https://github.com/opencv/opencv_contrib/archive/master.zip
+unzip opencv.zip
+unzip opencv_contrib.zip
+
+# Create build directory and switch into it
+mkdir -p build && cd build
+
+# Configure
+cmake -DOPENCV_EXTRA_MODULES_PATH=../opencv_contrib-master/modules ../opencv-master
+
+# Build
+cmake --build .
+# [body]

3rdparty/opencv-4.5.4/samples/install/linux_verify.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+# This script verifies that all shell snippets in the
+# Linux installation tutorial work (in Ubuntu 18 container)
+set -e
+set -x
+
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null && pwd )"
+
+docker pull ubuntu:18.04
+
+for f in $(cd "${SCRIPT_DIR}" && ls -1 linux_*install*.sh) ; do
+    echo "Checking $f..."
+    docker run -it \
+        --volume "${SCRIPT_DIR}":/install:ro \
+        ubuntu:18.04 \
+        /bin/bash -ex /install/$f --check
+
+done