Semiprivate threshold

[onvej-sl]

This PR allows for implementation of Wabisabi client library which will be used by Trezor.

[Szpoti]

ACK

[lontivero]

LGTM. Please fix the conflicts.

[onvej-sl]

LGTM. Please fix the conflicts.

Done.

git range-diff 3bd34b6012120344a8f315721f39792c3818ecbe..6ce15d75aa829bdb86361f0312e2668ad561b2e2 426e1d48b0cdb08717d43e73fe7b7efc0d7ba6a3..HEAD
1:  78792c6bf = 1:  b7373b3f7 Refactor SelectCoinsForRound
2:  6ce15d75a ! 2:  ebaaac5b3 Extend SelectCoinsForRound by parameter semiPrivateThreshold
    @@ WalletWasabi/WabiSabi/Client/CoinJoinClient.cs: public class CoinJoinClient
                SecureRandom = new SecureRandom();
                DoNotRegisterInLastMinuteTimeLimit = doNotRegisterInLastMinuteTimeLimit;
     @@ WalletWasabi/WabiSabi/Client/CoinJoinClient.cs: public class CoinJoinClient
    -   private TimeSpan DoNotRegisterInLastMinuteTimeLimit { get; }
      
    -   public bool ConsolidationMode { get; private set; }
    --  public bool RedCoinIsolation { get; }
    +   private bool ConsolidationMode { get; set; }
    +   private bool RedCoinIsolation { get; }
     +  private int SemiPrivateThreshold { get; }
        private TimeSpan FeeRateMedianTimeFrame { get; }