First version CRD DOCS

[idanl21]

• First version of CRD DOCS
• change busybox image to opster-pub-ecr image (from rate limit errors on past image)

[dbason]

Any reason to use a html table over a markdown one?

[swoehrl-mw]

This is missing some fields:

• nodePool.persistence
• nodePool.additionalConfig
• confMgmt
• general.drainDataNodes
• general.defaultRepo
• Fields from ImageSpec in general
• DashboardsTlsConfig
• Security and its subobjects are completely missing
• probably some more I didn't see

Types object should be the respective type, e.g. []NodePool instead of []object.

All field names should be written exactly as they appear in the YAML (e.g. jvm instead of JVM, tolerations instead of Tolerations).

PS: We should think about moving that doc into the userguide folder and linking it from the main.md