Impersonate from user menu dropdown

[eliasfernandez]

I've been working with Symfony's user impersonation feature and currently have it implemented in a custom Dashboard controller. However, in other admin systems, I've noticed that user impersonation is often available as an option in the user profile menu dropdown.
I believe adding this functionality to the user menu in EasyAdmin could be a useful addition. Here’s what I propose:

1. Configuration-based Activation: Add an optional configuration setting to enable impersonation in the user menu. By default, it would remain disabled for security and privacy, but integrators could enable it as needed.
2. Role-based Permissions: Allow the option to restrict impersonation to specific roles, so only authorized users can see and use the impersonation feature.

This enhancement would streamline the impersonation process, making it easier for administrators to manage and test user-specific functionalities directly from the user menu.

If the team is open to the idea, I'd be glad to start working on this feature. Please let me know your thoughts, and if any specific requirements or suggestions come to mind, I’d be happy to discuss them further!