Add YOLOv8 ONNX C++ inference Example (#856)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>
Co-authored-by: Ayush Chaurasia <ayush.chaurarsia@gmail.com>

examples/Yolov8_CPP_Inference/CMakeLists.txt

@@ -0,0 +1,28 @@
+cmake_minimum_required(VERSION 3.5)
+
+project(Yolov8CPPInference VERSION 0.1)
+
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+# CUDA
+set(CUDA_TOOLKIT_ROOT_DIR "/usr/local/cuda")
+find_package(CUDA 11 REQUIRED)
+
+set(CMAKE_CUDA_STANDARD 11)
+set(CMAKE_CUDA_STANDARD_REQUIRED ON)
+# !CUDA
+
+# OpenCV
+find_package(OpenCV REQUIRED)
+include_directories(${OpenCV_INCLUDE_DIRS})
+# !OpenCV
+
+set(PROJECT_SOURCES
+    main.cpp
+
+    inference.h
+    inference.cpp
+)
+
+add_executable(Yolov8CPPInference ${PROJECT_SOURCES})
+target_link_libraries(Yolov8CPPInference ${OpenCV_LIBS})