Remove unused methods and project file

Removed the `CeilPow2` method and its associated using directive from `MathUtilities.cs`.
Removed the entire content of the `Misaki.HighPerformance.Mathematics.csproj` file.

Added new classes and structures

Added a new `MemoryLeakException` class to handle memory leak reporting in `MemoryLeakException.cs`.
Added a new `AllocationInfo` struct to store allocation details in `AllocationManager.cs`.

Changed memory management logic

Changed memory allocation handling in `Program.cs` by introducing `unfreeArray` and `unfreeList`.
Changed the `_allocated` dictionary in `AllocationManager.cs` from `UnsafeHashMap` to `Dictionary` and updated allocation logic to store `AllocationInfo`.
Modified allocation and reallocation logic in `AllocationManager` to include stack trace information in debug mode.
Updated disposal logic in `AllocationManager` to throw a `MemoryLeakException` for unfreed allocations.

Misaki.HighPerformance.Unsafe/Exceptions/MemoryLeakException.cs

@@ -0,0 +1,49 @@
+using Misaki.HighPerformance.Unsafe.Services;
+using System.Diagnostics;
+using System.Text;
+
+namespace Misaki.HighPerformance.Unsafe;
+
+internal class MemoryLeakException(params AllocationInfo[] Infos) : Exception
+{
+    private static string GetMessage(StackTrace? stackTrace)
+    {
+        if (stackTrace == null)
+        {
+            return "No stack trace available.";
+        }
+
+        var stringBuilder = new StringBuilder();
+        stringBuilder.AppendLine("Memory leak detected at: ");
+
+        for (var i = 0; i < stackTrace.FrameCount; i++)
+        {
+            var frame = stackTrace.GetFrame(i);
+            if (frame != null)
+            {
+                stringBuilder.AppendLine($"File: {frame.GetFileName()}, Line: {frame.GetFileLineNumber()}");
+            }
+        }
+
+        return stringBuilder.ToString();
+    }
+
+    public override string Message
+    {
+        get
+        {
+#if DEBUG
+            var stringBuilder = new StringBuilder();
+            stringBuilder.AppendLine($"Found {Infos.Length} memory lakes!");
+            foreach (var info in Infos)
+            {
+                stringBuilder.AppendLine(GetMessage(info.StackTrace));
+            }
+
+            return stringBuilder.ToString();
+#else
+            return $"There are still {Infos.Length} buffers that hold {Infos.Sum(i => (uint)i.Size)} bytes in total are not freed yet. Please free them before disposing. Switch to debug mode for more information.";
+#endif
+        }
+    }
+}