Add time specification in actions

[blackheaven]

We should be able to specify time matcher:

[
  { name = "Backups"
  , match = "postgresql/*.tar.gz"
  , movers = [
        { inputPattern = "postgresql/(.*)$"
        , timed = Some
            { source = TimeSource.ModificationTime -- also CreationTime, Name { pattern : Text, format : UTC|Local|Day}
            , match = TimeMatch.And (TomeMatch.Older (TimeSpec.Relative 3 TimeUnit.Months)) (TimeMatch.Earlier (TimeSpec.AbsoluteUTC 2022-02-20 12:20:02))
            }
        , newName = "/mnt/long-term-storage/postgresql/\\1"
        }
    ]
  }
]