FeedOptions API / docs

[kushagraThapar]

NOTE : This change should be done in the end to avoid big PR conflicting issues.

• Rename FeedOptions -> QueryRequestOptions
• Hide constructor - which takes FeedOptions as arguments.
• Hide - getMaxItemCount() , getRequestContinuation(), getProperties() and setProperties()
• Hide - isEmptyPagesAllowed() - and setter.
• Hide - emit verbose tracing

[kushagraThapar]

This is done.