[Feature] Add synchronization between multiple ROMM instance

[y-streibel-uiris]

Is your feature request related to a problem? Please describe.
I am using ROMM in a container, and I would like to share the container's content with another ROMM instance hosted remotely. Currently, there is no straightforward way to synchronize content between multiple instances.

Describe the solution you'd like
I propose adding a feature in the configuration panel to enable seamless sharing and synchronization of content across multiple ROMM instances. This functionality could include options for automatic or manual synchronization, as well as settings for managing conflicts and bandwidth usage.

Describe alternatives you've considered
One alternative is using rsync to manually synchronize the content between ROMM instances. However, this requires additional setup, scripting, and maintenance, which makes it less convenient than a built-in feature.

Additional context
This feature would greatly improve the usability of ROMM for users running multiple instances, especially in distributed environments. It could be useful for teams or individuals needing consistent access to shared content.