Document support for the relevant services/operators that did not make for 1.0 GA.

• provide a list of all bindable services/Operators and mention that this support is Tech Preview only. Be explicit about which services SBO "works with" out of the box. 
• Also, provide a list of resources having binding annotations as bindable services in a namespace/cluster
• document a procedure to discover and view a list of bindable services that a non-privileged user has access to which are installed outside of his/her namespace but inside the cluster