API pain point adding annotation to PageViewComponent

[pcorless]

Of recent and of late there are users that need to dynamically add annotations to PDF content. The annotation data may have been saved to a DB or a flat file but in either way it needs to be injected back into the view and eventually on the screen or capture.

When working in the viewer, the annotation must be create and then an annotation component must be create so the user can interact with the annotation. This process can be difficult to achieve by the end user of the API. The process requires quite a bit of work an there can be timing issues with the various thread in play.

This ticket is to capture building out an API to streamline this process.