[FEATURE] Import/Export Docker images/containers

[master3395]

When we back up our CyberPanel and migrate to a new setup, re-adding all the Docker images and containers can be a tedious process.

It would be incredibly helpful if there were an option to import/export these configurations.
Additionally, having a method to handle advanced environment variables (ENV) in bulk would save a lot of time, especially when dealing with multiple configurations. Currently, adding 12-20 ENV settings one by one is quite time-consuming.

For reference, here's how Portainer allows users to manage ENV configurations in an advanced manner:

Here is how CyberPanel shows every ENV atm.

https://community.cyberpanel.net/t/feature-import-export-docker-images-containers/54580