Adding a Resnet C++ example

[vinhngx]

Description

Adding an example of how to convert a ResNet model with the Python API, then serve the optimized model in C++

Type of change

Adding a new C++ example

Checklist:

• My code follows the style guidelines of this project (You can use the linters)
• [x ] I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas and hacks
• I have made corresponding changes to the documentation
• I have added tests to verify my fix or my feature
• New and existing unit tests pass locally with my changes
• I have added the relevant labels to my PR in so that relevant reviewers are notified

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[narendasan]

LGTM