Camera method to see if an area is visible

## What problem does this solve or what need does it fill?

I only want to play an animation if it would be visible.

## What solution would you like?

Given an OrthographicCameraBundle, I want to know if a given rectangular area is on screen or not.

Start by locating OrthographicCameraBundle and the camera visibility or projection entry points. Clarify how a rectangular area should be represented and whether partial visibility counts; done means the camera exposes a documented way to determine whether the area is on screen, with coverage for the chosen visibility behavior.

Written by the indexing model from the issue text.