* Create QuickStartGuide.md
Creating a new Quickstart guide that captures simple onboarding instructions. The intent is for first time users to be able to follow this guide and get their environment running and try out ARC. A link to this guide would be added to the repo readme once this PR get merged.
* Update QuickStartGuide.md
Fixed a typo - removed "$" from codeblock "$ kubectl apply -f runnerdeployment.yaml"
* Update QuickStartGuide.md
Eliminated need to specify PAT in Custom_values.yaml. Instead passing as parameter while installing helm chart. This eliminates need to store PAT in a file and also eliminates a setup step.
* Fixed minor typos
Fixed types identified by @nebuk89
* Minor formatting in links and periods.
Fixed formatting to include space after period and commas. Fixed formatting on some links to include quotes
Vijay-train