feat: schedule deprecation for `action:category.loaded` and `action:category.loading`. Use `action:topics.loaded/ing` instead

(or action:ajaxify.end if you are using it to check cid on page load)

public/src/modules/hooks.js

@@ -6,6 +6,8 @@ define('hooks', [], () => {
 		temporary: new Set(),
 		deprecated: {
 			'action:script.load': 'filter:script.load',	// 👋 @ 1.18.0
+			'action:category.loaded': 'action:topics.loaded',
+			'action:category.loading': 'action:topics.loading',
 		},
 	};