Refactor Under Development

[zgjja]

Background

This is a PR under development, aiming to refactor the sub-projects in this repo, The major advantages contain:

1. better code guidance for users to know about the supported TensorRT version of current sub-project
2. making all CMake syntax modern and provide a more robust way to find proper TensorRT libraries
3. add a New entrance, allowing user to configure and build multiple sub-projects (only applied to a few sub-projects for now)
4. update some sub-projects, making them support newer version TensorRT while keeping the backward compatibility
5. update all documentations, including deleting the deprecated things, add something new, and better anchor links

Plan

refactored Sub-projects:

Model	Done?	Supported Version
mlp	✅	7.x/8.x/10.x
lenet	✅	7.x/8.x/10.x
alexnet	✅	7.x/8.x/10.x
vgg	✅	7.x/8.x/10.x
inception	❌	7.x
mobilenet	❌	7.x
densenet	❌	7.x
shufflenetV2	❌	7.x
...	...	...

More ...