[Feature request] Merge identical fields after Craft 5 upgrade

[KevinBodi]

What are you trying to do?

We want to reduce clutter in the control panel and increase our speed when needing to update multiple fields which are identical.

What's your proposed solution?

1. Create a flow for merging multiple fields after checking them
2. Choose which of the fields should be the new master
3. Get error if the fields we try to merge are not the same type
4. Give warning if any config other than title, handle, required or description is different. Let the user decide if they want to proceed.
5. Let values like title, handle, required and description be overwritten to the previous field's value in the element where it's used so that the editor experience and data structure remains intact.

Additional context

After upgrading to Craft 5, previous fields from Matrixes now appear as many identical fields. It would be good to finally unite these.