Enhancement: Show progress bar during restore

The `restore` command now shows a progress report while restoring files.

Example: `[0:42]  5.76%  23 files 12.98 MiB, total 3456 files 23.54 GiB`

JSON output is now also supported.

https://github.com/restic/restic/issues/426
https://github.com/restic/restic/issues/3413
https://github.com/restic/restic/issues/3627
https://github.com/restic/restic/pull/3991
https://github.com/restic/restic/pull/4314
https://forum.restic.net/t/progress-bar-for-restore/5210
