Functionality and classes separated. Kernel initialization made dependent on a flag. Cleanup.

PerfectNumbers.Core/Gpu/AcceleratorReferenceComparer.cs

@@ -0,0 +1,13 @@
+using System.Runtime.CompilerServices;
+using ILGPU.Runtime;
+
+namespace PerfectNumbers.Core.Gpu;
+
+internal sealed class AcceleratorReferenceComparer : IEqualityComparer<Accelerator>
+{
+	internal static AcceleratorReferenceComparer Instance { get; } = new();
+
+	public bool Equals(Accelerator? x, Accelerator? y) => ReferenceEquals(x, y);
+
+	public int GetHashCode(Accelerator obj) => RuntimeHelpers.GetHashCode(obj);
+}