Add packages and wrapper steps to quickstart guide

Add steps to the end of the following doc for our quickstart deployment-scenario showing how to deploy a mission or third-party app into BigBang.

Covering

1. using only our new packages: key released in 2.0

2. using the wrapper package in conjunction to add NPs, istio VirtualServices, etc. : https://repo1.dso.mil/big-bang/bigbang/-/blob/master/chart/values.yaml#L1830