Enhance wiki pages covering intent framework

An understanding of the intent processing lifecycle is critical for developers. The current Intent Framework wiki pages are a good intro but could be usefully extended through narrative description (or sequence diagram) using a specific intent (eg HostToHostIntent) as an illustrative example. What I envisage is a reasonable explanation of sequential concrete class interactions - this would build on the existing state diagram leading to a better understanding of the Intent lifecyle and its interaction with other services.