Refactored MtApi4 (MT4) for working with new architecture

MtApi/MtProtocol/MtRpcQuote.cs

@@ -0,0 +1,9 @@
+namespace MtApi.MtProtocol
+{
+    internal class MtRpcQuote
+    {
+        public MtTick? Tick { get; set; }
+        public string? Instrument { get; set; }
+        public int ExpertHandle { get; set; }
+    }
+}