Fill out in depth comparison table with `rustic`

[simonsan]

I'm considering adding rustic to my backup benchmark system at https://github.com/deajan/backup-bench#in-depth-comparison-of-backup-solutions
Would you mind filling the in depth comparison table with rustic ?

Originally posted by @deajan in rustic-rs/rustic#530 (comment)

[simonsan]

First work has been done and is available here: https://rustic.cli.rs/docs/comparison-restic.html

[simonsan]

This should be relative complete and extensive now, closing this.