MtApi5: Moving some functions to new core

MtApi5/MtProtocol/MtQuote.cs

@@ -0,0 +1,9 @@
+namespace MtApi5.MtProtocol
+{
+    internal class MtQuote
+    {
+        public MtTick? Tick { get; set; }
+        public string? Instrument { get; set; }
+        public int ExpertHandle { get; set; }
+    }
+}