feature RQ -- Bedrock Worlds backup

My server's been been working great on my MacMini, thanks to this repo! With few friends we've started building a village, with people connecting at various times. It would be a shame if all wonderful builds they create got destroyed.

Bedrock server has the built-in backup functionality which works as I tested. But it is far from automated.

It involves tying in the server console `save hold`, `save query`, copy world files and `save resume`.

I was wondering if it would be somehow possible to automate it. Run with an interval. Perhaps a shell script in the container sending mentioned commands to the Bedrock console and then copying files to an external volume.

I could work on this but don’t have clue where to start...

Maybe I could use something like Expect?

The issue names no files or tests. Start by reviewing how the container exposes the Bedrock server console and volumes, then define automation around `save hold`, `save query`, copying world files, and `save resume`; done means scheduled backups are written to the external volume without interrupting the server.

Written by the indexing model from the issue text.