Mirror questions/dashboards to other collection

**Is your feature request related to a problem? Please describe.**
Sometimes users want to share a specific question/dashboard to other users but this will mean that they will need to copy the item/s to the appropiate collection, but this means that if the original question/dashboard changes the copied object gets outdated.

**Describe the solution you'd like**
Mirror questions and dashboards to specific collections. This means that the entity will still reside in the original collection, but it can be seen (only seen, not modified?) by users which have access to another collection.

**Describe alternatives you've considered**
None, unless you copy those but you run into maintenance problems

**How important is this feature to you?**
Requested by a customer

**Additional context**
Is there a problem I'm not seeing here? 🤔

No files, tests, or entry points are identified in the issue. First clarify whether mirroring is read-only, how it interacts with collection permissions, and what happens when the source changes. Done should include agreed behavior for questions and dashboards, access control, and synchronization.

Written by the indexing model from the issue text.