Add models to controllers

We should add models to controllers using `@property` annotations.

* If `$uses` is an array, we should add all the models listed, and those in the `AppController` (and the plugin's `AppController` if appropriate)
* If `$uses` is false, we should not add any models
* If `$uses` is missing, we should add only the models in the `AppController` (and the plugin's `AppController` if appropriate)

See https://book.cakephp.org/2/en/controllers.html#Controller::$uses.

Start with the controller handling and annotation logic, using the CakePHP Controller::$uses documentation as the behavioral reference. Trace how controllers, AppController, and plugin AppController models are discovered, then verify the three cases: an array includes all listed models, false includes none, and a missing value inherits only the applicable AppController models.

Written by the indexing model from the issue text.