Add Quickstart for NetworkTraversal for JS

[AriZavala2]

Purpose

• Add Quickstart for NetworkTraversal for JS

Does this introduce a breaking change?

[ ] Yes
[X] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[X] Other... Please describe: Sample

## How to Test
*  Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

* Test the code
<!-- Add steps to run the tests suite and/or manually test -->

## What to Check
Verify that the following are valid
* ...

## Other Information
<!-- Add any other helpful information that may be needed here. -->

[ajpeacock0]

I don't think we need the files in a javascript directory under network-traversal-quickstart/javascript since this entire repo is js. Also looking at the existing examples, it looks like the directory name relates to the scenario, so something like network-traversal-get-relay-config