Document why mouseMove/mouseEnter/mouseLeave are excluded from event list

Author: johanrd

lib/rules/template-no-passed-in-event-handlers.js

@@ -1,4 +1,8 @@
-// Comprehensive Ember event handler names
+// Ember event handler names that map to Ember's classic event system.
+// Matches upstream ember-template-lint's no-passed-in-event-handlers list exactly.
+// Note: mouseMove, mouseEnter, and mouseLeave are intentionally excluded —
+// upstream does not include them, as they are native DOM events that do not
+// have corresponding Ember classic-event aliases on components.
 const EMBER_EVENTS = new Set([
   'touchStart',
   'touchMove',