Refactor process lifecycle to use Start, Tick, Stop methods and metrics

Processing/ProcessMetrics.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace RemSox.Processing
+{
+    public class ProcessMetrics
+    {
+        public int AverageTickTimeMs { get; set; }
+
+        public int LastTickTimeMs { get; set; }
+    }
+}