[Task] Define and Implement Cryostat QuickStart guidelines

[maxcao13]

We should establish and define wording, styling, and general guidelines for writing quickstarts in Cryostat. They should be aligned with OpenShift and Patternfly's guidelines here:

OpenShift: Creating QuickStart Tutorials

https://access.redhat.com/documentation/en-us/openshift_container_platform/4.8/html/web_console/creating-quick-start-tutorials#quick-start-content-guidelines_creating-quick-start-tutorials