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/modules/videoio/cmake/detect_aravis.cmake

@@ -0,0 +1,32 @@
+# --- Aravis SDK ---
+if(NOT HAVE_ARAVIS_API AND PKG_CONFIG_FOUND)
+  ocv_check_modules(ARAVIS aravis-0.6 QUIET)
+  if(ARAVIS_FOUND)
+    set(HAVE_ARAVIS_API TRUE)
+  endif()
+endif()
+
+if(NOT HAVE_ARAVIS_API)
+  find_path(ARAVIS_INCLUDE "arv.h"
+    PATHS "${ARAVIS_ROOT}" ENV ARAVIS_ROOT
+    PATH_SUFFIXES "include/aravis-0.6"
+    NO_DEFAULT_PATH)
+  find_library(ARAVIS_LIBRARY "aravis-0.6"
+    PATHS "${ARAVIS_ROOT}" ENV ARAVIS_ROOT
+    PATH_SUFFIXES "lib"
+    NO_DEFAULT_PATH)
+  if(ARAVIS_INCLUDE AND ARAVIS_LIBRARY)
+    set(HAVE_ARAVIS_API TRUE)
+    file(STRINGS "${ARAVIS_INCLUDE}/arvversion.h" ver_strings REGEX "#define +ARAVIS_(MAJOR|MINOR|MICRO)_VERSION.*")
+    string(REGEX REPLACE ".*ARAVIS_MAJOR_VERSION[^0-9]+([0-9]+).*" "\\1" ver_major "${ver_strings}")
+    string(REGEX REPLACE ".*ARAVIS_MINOR_VERSION[^0-9]+([0-9]+).*" "\\1" ver_minor "${ver_strings}")
+    string(REGEX REPLACE ".*ARAVIS_MICRO_VERSION[^0-9]+([0-9]+).*" "\\1" ver_micro "${ver_strings}")
+    set(ARAVIS_VERSION "${ver_major}.${ver_minor}.${ver_micro}")  # informational
+    set(ARAVIS_INCLUDE_DIRS "${ARAVIS_INCLUDE}")
+    set(ARAVIS_LIBRARIES "${ARAVIS_LIBRARY}")
+  endif()
+endif()
+
+if(HAVE_ARAVIS_API)
+  ocv_add_external_target(aravis "${ARAVIS_INCLUDE_DIRS}" "${ARAVIS_LIBRARIES}" "HAVE_ARAVIS_API")
+endif()