Design doc for v1 Operator API

[Vinod Kone]

Hi folks,

Here is the design doc for the v1 Operator API. Please take a look and give
us feedback.

https://docs.google.com/document/d/1XfgF4jDXZDVIEWQPx6Y4glgeTTswAAxw6j8dPDAtoeI/edit?pref=2&pli=1#

Thanks,
Vinod