cndp-frr: add an example showing CNET + FRR

[maryamtahhan]

Add an example that shows cnet working with frr
TODO

• update license header on all files
• fix missing Empty lines at the end of file
• Debug double free issue on cnet close up

CNDP-cli:/> 
>>> Terminating with signal 2
    Close lport 0 - 'eth0:0'
    Close lport 1 - 'eth1:0'
double free or corruption (!prev)
Aborted (core dumped)

• Fix super linter issues

[maryamtahhan]

Hey @KeithWiles

Sorry for such a big submission in one go. It's ready for review now.

Thanks

[KeithWiles]

As Keith is famous for huge PRs it only seems reasonable. I will try to have a look today. Thank you.

[KeithWiles]

Have a look and see if we need to do any of the changes and if not then I can approve.

Thank you