Add option to automatically apply custom classes to Page without requiring file in /site/classes/

[Toutouwai]

There might be some reason why this wouldn't be a good idea, but could there be an additional option when using $config->usePageClasses = true so that pages automatically get a custom Page class that extends DefaultPage without there needing to be a matching class file in /site/classes/?

So that if I have a page using template product_page it is automatically an instance of ProductPage even if I haven't create a ProductPage.php file?

If I have a template that doesn't need any special methods in a custom class file beyond what I've added to DefaultPage I typically don't create an empty class file in /site/classes/. That would be just one more thing to remember (although I guess it could be done with a hook), clutters up the /site/classes/ folder, and feels redundant.

But then if I want to take advantage of Page class hookable methods I either have to create the empty class file, or if I want the clean separation of separate hooks for different Page classes I have to use a mixture of different approaches depending on whether the class file exists or not.

// Page with class file
// I'd rather do this for all pages as the separation is cleaner than having a chain of logic inside a single hook
$wire->addHook('FooPage::saveReady', function($event) {
    // ...
});

// Page without class file
$wire->addHook('Page::saveReady', function($event) {
    $page = $event->object;
    if($page->template == 'bar') {
        // ...
    }
});

It would be nice to have all pages handled in the same way without needing empty class files.