Add IPool interface

Pooling/IPool.cs

@@ -0,0 +1,16 @@
+using Exanite.Core.Runtime;
+
+namespace Exanite.Core.Pooling
+{
+    public interface IPool<T> : ITrackedDisposable
+    {
+        public PoolUsageInfo UsageInfo { get; }
+
+        public Pool<T>.Handle Acquire(out T value);
+        public T Acquire();
+
+        public void Release(T element);
+
+        public void Clear();
+    }
+}

Pooling/Pool.cs

@@ -16,7 +16,7 @@ public abstract class Pool : ITrackedDisposable
     /// <summary>
     /// Conventional object pool where objects can be acquired and released.
     /// </summary>
-    public class Pool<T> : Pool
+    public class Pool<T> : Pool, IPool<T>
     {
         private readonly Queue<T> values;