Add funding rate watcher (#2)

* Add FundingRate interfaces and worker

* Add build on PR

* Remove zip

* Specify the solution path

* Add build for worker too

* Set up StatisticService.cs for funding rate

* Add Fundingrate alerts

* Send alert when big funding rate change + add SlashCommands.cs for fundingrate

* Remove fixtures

* Refact names

* Renames

src/Managing.Common/Constants.cs

@@ -7,6 +7,7 @@
             public const string Leaderboard = "leaderboard";
             public const string Noobiesboard = "noobiesboard";
             public const string LeaderboardPosition = "leaderboardposition";
+            public const string FundingRates = "fundingrates";
         }
 
         public class DiscordButtonAction
@@ -36,4 +37,4 @@
             public const string Usdt = "USDT";
         }
     }
-}
+}