Doc in the Operator-SDK the difference between kubebuilder and operator-sdk

[camilamacedo86]

Feature Request

Describe the problem you need a feature to resolve.

This question is common see: #1758

Describe the solution you'd like.

I think that would be great have a section to describe it in the https://sdk.operatorframework.io/ or at least which would link the post https://www.openshift.com/blog/operator-sdk-reaches-v1.0

[jberkhahn]

TODO: add a section to the top of the FAQ docs that answers the question "whats the difference between Operator-SDK and Kubebuilder?" Include a link to https://www.openshift.com/blog/operator-sdk-reaches-v1.0 which discusses the current (post 1.0) differences and #1758 which discusses legacy (pre 1.0) differences.