ts: types for DOM elements

[nd0ut]

We need to implement something like this:

declare global {
  namespace JSX {
    interface IntrinsicElements {
       [...]
      "ion-toggle": Components.IonToggleAttributes;
      "ion-toolbar": Components.IonToolbarAttributes;
      "ion-virtual-scroll": Components.IonVirtualScrollAttributes;
    }
  }
}