Feature Description

As discussed at depth in #1046, Optimization Detective is to be an infrastructure/framework/API dependency plugin which isn't promoted directly to end-users. Instead, a dependent plugin like "Image Loading Optimization" (or perhaps "Image Prioritizer") would be developed which extends Optimization Detective with the image-related aspects.

To do this, we will need to ensure that Optimization Detective exposes an API that allows dependent plugins to hook into the detection and optimization process. For detection, I'm assuming this looks like a PHP filter that allows additional tags to be targeted for visiting by the tag processor. And then for optimization, this could look like an action that fires at each such tag which is visited.