WIP!!! FEATURE: Augment nodes in guestframe with html comments instead of data attributes

[Sebobo]

Relates: #3231

What I did

How I did it

Instead of a wrapping Dom element or augmenting a nodes markup, the backend creates 2 encapsulating html comments that contain all necessary data and allow interactions with nodes without markup manipulations.

This also needs an adjustment in Neos.Neos, as the wrapping class is still there.

• Wrap content with comments instead of augmenting with data attributes
• Load node addresses from comments
• Make nodes selectable from content tree and in guest frame
• Make nodes without markup work (no highlighting though)
• Nodes are fully inline editable
• OOB rendering reload
• OOB move/copy (50%, still buggy)
• Insert new node (untested)
• Implement node highlighting from host frame like the buttoner
• Make sure nodes with multiple Dom nodes without a single wrapping Dom element work correctly
• Check if property augmenter can also be switched to comments (can be also a separate PR)
• Move augmentation logic from Neos.Neos to Neos.Ui
• Check if insertion anchor can be a comment (can also be a separate PR)

How to verify it

All manipulations of nodes in the guest frame and access from the host frame still work + e2e tests.