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

PckStudio.Core/Extensions/EnumerableExtensions.cs

@@ -0,0 +1,38 @@
+using System.Collections.Generic;
+using System.Linq;
+
+namespace PckStudio.Core.Extensions
+{
+    public static class EnumerableExtensions
+    {
+        public static IEnumerable<(int index, T value)>enumerate<T>(this IEnumerable<T> array)
+        {
+            int i = 0;
+            foreach (T item in array)
+            {
+                yield return (i++, item);
+            }
+            yield break;
+        }
+
+        public static bool EqualsAny<T>(this T type, params T[] items)
+        {
+            foreach (T item in items)
+            {
+                if (item.Equals(type))
+                    return true;
+            }
+            return false;
+        }
+
+        public static bool ContainsAny<T>(this IEnumerable<T> array, params T[] items)
+        {
+            foreach (T item in array)
+            {
+                if (items.Contains(item))
+                    return true;
+            }
+            return false;
+        }
+    }
+}