Docs: Mention existing `Neos.NodeCreated` `Neos.NodeRemoved` `Neos.NodeSelected` events

[mhsdesign]

https://docs.neos.io/cms/manual/extending-the-user-interface/interacting-with-the-neos-backend#javascript-events

The Neos backend will dispatch events that can be listened on when the following events occur:

• Neos.NodeCreated When a new node was added to the document. The event has a reference to the DOM element in event.detail.element. Additional information can be fetched through the element’s attributes.
• Neos.NodeRemoved When a new node was removed from the document. The event has a reference to the DOM element in event.detail.element. Additional information can be fetched through the element’s attributes.
• Neos.NodeSelected When a node existing on the page is selected. The event has a reference to the DOM element in event.detail.element and the node model object in event.detail.node. Additional information can be fetched through the node model.

Also link to node model ts interface

[mhsdesign]

Also mention https://github.com/mhsdesign/MhsDesign.LiveInspectorDomChange i the docs #3