Make media and list items draggable

What does this MR do and why?

Make media and list items draggable

In rich text editor, make images, audio, video and list items (including bullet lists, numeric lists and task lists) draggable.

Changelog: changed

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

Case	Video
Bullet list	bullet list.mov
Numeric list	numeric list.mov
Task list	task list.mov
Image	image.mov
Audio	Screen Recording 2024-05-15 at 12.26.13 PM.mov
Video	video.mov

How to set up and validate locally

1. In rich text editor, insert a bullet list, numeric list, task list, image, audio or video.
2. Try to drag it around. It should work as expected.

Note: Audio can only be dragged using the link below the audio.

Related to #452233 (closed)