Same feature as v1.13: EZP-27759

This feature should have 2 options:

• button on admin interface as 1.13
• command line

Command line specification

bin/console ezplatform:copy-subtree <sourceLocationId> <targetLocationId>

The command should only output success/failure. Clean messages should be outputted when the source or target locations don't exist. The operation should be done as admin user.

Edge cases:

• Target is not a container -> not possible, impossible to select the content item
• Source is not a container -> possible, it will be just a copy
• Source has no children -> possible, it will be a copy of the content item