Implementation of Bybit V5 unified API (#801)

Implemented main private and public methods, some public (candles and orderbook) and private WebSockets. A decision was made to split spot, inverse, linear, and option branches into different APIs because: 1) market symbols intersect, 2) there are no any method to get all the markets (all orders, all positions) from different branches in one call. Branches behave as separate exchanges.

Author: TarasMi

src/ExchangeSharp/API/Exchanges/Bybit/ExchangeBybitInverseAPI.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+using ExchangeSharp.Bybit;
+
+namespace ExchangeSharp
+{
+	[ApiName(ExchangeName.Bybit)]
+	public class ExchangeBybitInverseAPI : ExchangeBybitV5Base
+	{
+		protected override MarketCategory MarketCategory => MarketCategory.Inverse;
+		public override string BaseUrlWebSocket => "wss://stream.bybit.com/v5/public/inverse";
+		public ExchangeBybitInverseAPI()
+		{
+		}
+		public ExchangeBybitInverseAPI(bool isUnifiedAccount)
+		{
+			IsUnifiedAccount = isUnifiedAccount;
+		}
+	}
+}

src/ExchangeSharp/API/Exchanges/Bybit/ExchangeBybitLinearAPI.cs

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+using ExchangeSharp.Bybit;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace ExchangeSharp
+{
+	[ApiName(ExchangeName.Bybit)]
+	public class ExchangeBybitLinearAPI : ExchangeBybitV5Base
+	{
+		protected override MarketCategory MarketCategory => MarketCategory.Linear;
+		public override string BaseUrlWebSocket => "wss://stream.bybit.com/v5/public/linear";
+		public ExchangeBybitLinearAPI()
+		{
+		}
+		public ExchangeBybitLinearAPI(bool isUnifiedAccount)
+		{
+			IsUnifiedAccount = isUnifiedAccount;
+		}
+	}
+}

src/ExchangeSharp/API/Exchanges/Bybit/ExchangeBybitOptionAPI.cs

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+using ExchangeSharp.Bybit;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace ExchangeSharp
+{
+	[ApiName(ExchangeName.Bybit)]
+	public class ExchangeBybitOptionAPI : ExchangeBybitV5Base
+	{
+		protected override MarketCategory MarketCategory => MarketCategory.Option;
+		public override string BaseUrlWebSocket => "wss://stream.bybit.com/v5/public/option";
+		public ExchangeBybitOptionAPI()
+		{
+		}
+		public ExchangeBybitOptionAPI(bool isUnifiedAccount)
+		{
+			IsUnifiedAccount = isUnifiedAccount;
+		}
+	}
+}

src/ExchangeSharp/API/Exchanges/Bybit/ExchangeBybitSpotAPI.cs

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+using ExchangeSharp.Bybit;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace ExchangeSharp
+{
+	[ApiName(ExchangeName.Bybit)]
+	public class ExchangeBybitSpotAPI : ExchangeBybitV5Base
+	{
+		protected override MarketCategory MarketCategory => MarketCategory.Spot;
+		public override string BaseUrlWebSocket => "wss://stream.bybit.com/v5/public/spot";
+		public ExchangeBybitSpotAPI()
+		{
+		}
+		public ExchangeBybitSpotAPI(bool isUnified)
+		{
+			IsUnifiedAccount = isUnified;
+		}
+	}
+}