Support for progress of running backup & restore jobs

[devmato]

First of all thank you for the excellent library. I'm using it to develop a web based centralized backup solution. One thing I'm currently missing is the possibility to get the progress of a running backup, or restore job.

The restic binary is printing regular progress updates to stdout when running the backup command with the --json argument. Maybe this could be used to invoke a callback function, whenever a new progress update appears.

Are there any plans for something like this?

[mtlynch]

Oh, this is a cool idea!

This is not something I'm planning to implement, but I'd be open to it if someone wants to contribute.