#3458503: Improve the page hierarchy display

Closes #3458503

:rotating_light:This MR still has the temporary cy.wait()'s in tests that are to be replaced but everything else can still be reviewed.

This MR uses cy.wait()'s in tests that are marked with a TODO to replace them.

• Adds drag and drop functionality in the layers menu. Can move components from a slot to another slot, from a slot to the root level, undo and redo works
  • Some dragging related behaviors and design still need to be refined. I created a followup issue for that and in the IS there are edge cases that I've noticed so far. https://www.drupal.org/project/experience_builder/issues/3470594
• Adds Cypress dnd functionality taken from https://github.com/dmtrKovalenko/cypress-real-events/pull/17/files