Add a new command about asfenhance

[chr233]

I had wrote another plugin for such card trade: https://github.com/chr233/CardTradeExtension

it can let you to transfer sets of card to other by given trade link

[chr233]

I see, I'm working on it.

[aVitaliy]

I don't know but it doesn't work for me.

`!FULLSET Bot1 730
<
CardTradeExtension 遇到错误, 日志如下
==========================================

• 原始消息: FULLSET Bot1 730
• Access: Owner
• ASF 版本: 5.4.4.5
• 插件版本: 1.0.3.1
  ==========================================
  {
  "EULA": true,
  "Statistic": true,
  "DisabledCmds": [
  "FOO",
  "BAR"
  ],
  "MaxItemPerTrade": 255
  }
  ==========================================
• 错误类型: System.MissingMethodException
• 错误消息: Attempted to access a missing method.
  at CardTradeExtension.Card.Handler.GetAppCardGroup(Bot bot, IEnumerable1 appIds, IEnumerable1 inventory)
  at System.Runtime.CompilerServices.AsyncMethodBuilderCore.StartTStateMachine
  at CardTradeExtension.Card.Handler.GetAppCardGroup(Bot bot, IEnumerable1 appIds, IEnumerable1 inventory)
  at CardTradeExtension.Card.Command.ResponseFullSetCountOfGame(Bot bot, String query)
  at ArchiSteamFarm.Core.Utilities.InParallel[T](IEnumerable1 tasks) at CardTradeExtension.Card.Command.ResponseFullSetCountOfGame(String botNames, String query) at CardTradeExtension.CardTradeExtension.ResponseCommand(Bot bot, EAccess access, String message, String[] args, UInt64 steamId) at CardTradeExtension.CardTradeExtension.OnBotCommand(Bot bot, EAccess access, String message, String[] args, UInt64 steamI