Added Yolo3Detector with non-maximum suppression

[dani217s]

PR Details

Adds a node that implement non-maxumum suppression on Yolo

Description

OpenCv -> Detection-> YOLO3Detector

Related Issue

Motivation and Context

YOLODetector node not implement non-maximum suppression

Types of changes

• [ ] Docs change / refactoring / dependency upgrade
• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• [ ] My change requires a change to the documentation