Support editing web components (+shadow DOM) in CKEditor 5

[Reinmar]

This is an umbrella ticket for editing web components (with possible shadow DOM) inside CKEditor 5.

For now, this topic wasn't researched yet. We want to gather feedback first.

Known issues:

• [ ] Cursor disappears after deleting the text inside web component https://github.com/ckeditor/ckeditor5/issues/5724

Related tickets (for componentizing the entire editor):

• WebComponent for CKEditor 5
• Engine's support for running in a shadow DOM

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[CKEditorBot]

There has been no activity on this issue for the past year. We've marked it as stale and will close it in 30 days. We understand it may be relevant, so if you're interested in the solution, leave a comment or reaction under this issue.

[CKEditorBot]

We've closed your issue due to inactivity over the last year. We understand that the issue may still be relevant. If so, feel free to open a new one (and link this issue to it).

[Witoso]

Reopening the umbrella.