[core] better jsdoc support EVENTS

[thepassle]

class MyElement extends HTMLElement {
  /**
   * Dispatched when the enter key is pressed
   * @fires {Event} some-event - some description for some-event
   * @event {SomeCustomEvent} foo-changed - some description for foo-changed
   */
  this.dispatchEvent(new CustomEvent('foo-changed'));
}

• [ ] Supports @fires
• [ ] Supports @event
• [ ] Add docs
• [ ] If not Event or CustomEvent, add Reference to the event (it should be in imports or in declarations after the analyze phase)
• [ ] Make sure the description after @event or @fires overwrites the description on top
• [ ] Deal with jsdoc type imports ${import('./module.js').SomeEvent}. Get type SomeEvent, add reference to ./module.js
• [ ] merge or override with JSDoc declared above the class