Provide quickstarts of Keycloak Operator

[rmarting]

Description

Keycloak Operator is not include in the current quickstarts, and it is a good component to explain with Keycloak on the most common environments: Kuberntes, and OpenShift.

Providing a quickstart (linked with some of the Guides) can help others to understand how use it and test it (increasing the adoption of it).

A sample scenarios can be enough to start, and later add more complex ones with more advanced options or configurations.

Discussion

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Motivation

Help users and developers how to Keycloak Operator works on the most common environments: Kubernetes, and OpenShift.
Provide some good examples and use cases of Keycloak Operator.

Details

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