Move Common functionality to Core project & rendering and Model support as well

PckStudio.Core/Extensions/MathExtensions.cs

@@ -0,0 +1,16 @@
+using System;
+
+namespace PckStudio.Core.Extensions
+{
+    public class MathExtensions
+    {
+        public static T Clamp<T>(T value, T min, T max) where T : IComparable<T>
+        {
+            if (value.CompareTo(min) < 0)
+                return min;
+            if (value.CompareTo(max) > 0)
+                return max;
+            return value;
+        }
+    }
+}