fix: register custom events into GlobalEventHandlersEventMap

[fredj]

Without this, I get the following error with:

profile.addEventListener("over", (event: CustomEvent<OverDetails>) => {});

No overload matches this call.
  Overload 1 of 2, '(type: keyof HTMLElementEventMap, listener: (this: HTMLElement, ev: Event | ErrorEvent | UIEvent | AnimationEvent | MouseEvent | ... 13 more ... | WheelEvent) => any, options?: boolean | ... 1 more ... | undefined): void', gave the following error.
    Argument of type '"over"' is not assignable to parameter of type 'keyof HTMLElementEventMap'.
  Overload 2 of 2, '(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions | undefined): void', gave the following error.
    Argument of type '(event: CustomEvent<OverDetails>) => void' is not assignable to parameter of type 'EventListenerOrEventListenerObject'.
      Type '(event: CustomEvent<OverDetails>) => void' is not assignable to type 'EventListener'.
        Types of parameters 'event' and 'evt' are incompatible.
          Type 'Event' is missing the following properties from type 'CustomEvent<OverDetails>': detail, initCustomEvent ts(2769)

One alternative is to use as EventListener