FR - Allow to set unlimited upload/download speed in scheduler

[btTeddy]

Would be handy to have option to set unlimited upload/download speed in scheduler. For simplicity, it could just skip share settings completely.

Equivalent of turning off speedrr and then manually setting Download limit: ∞ in every qbit instance

example config

modules:
  schedule:
    - start: "00:00"
      end:   "06:59"
      days: [all]
      upload: unlimited
      download: unlimited