Execute logic when exiting content redaction mode

As a Studio developer, I can plug logic to execute using a chain or a script when content redaction mode is exited.

Acceptance criteria:

Default logic is provided out of the box to

• create a new document in the same space if redactions were made; named [TITLE] - Redacted
• TBD: restrict permission on original document to people having redact permission?
• TBD: create a relation between these docs? (I don't think we have a way to manage the relation later on and UX might be sub par)

The following information is provided in the context:

• Redacted blob
• Document id where the redaction happened
• Number of redactions in the document (fallback: boolean to know if redactions exist in the document)