Refactor collections, add Remove overloads, bump version

- Bump project version to 1.3.9.
- Move HashMapHelper to Collections namespace.
- Simplify UnsafeList<T>.AddRange to use only Span<T>.
- Add Remove overloads with out parameter to UnsafeSlotMap<T> and UnsafeSparseSet<T>.
- Improve MemoryLeakException stack trace formatting.
- Remove obsolete commented code in IJobSPMD.cs.

Misaki.HighPerformance.LowLevel/contentFiles/cs/any/MemoryLeakException.cs

@@ -1,5 +1,6 @@
 using Misaki.HighPerformance.LowLevel.Buffer;
 using System.Diagnostics;
+using System.Runtime.CompilerServices;
 using System.Text;
 
 namespace Misaki.HighPerformance.LowLevel;
@@ -45,9 +46,11 @@ public class MemoryLeakException : Exception
         for (var i = 0; i < stackTrace.FrameCount; i++)
         {
             var frame = stackTrace.GetFrame(i);
-            if (frame != null)
+            var fileName = frame?.GetFileName();
+            
+            if (frame != null && fileName != null)
             {
-                stringBuilder.AppendLine($"File: {frame.GetFileName()}, Method: {DiagnosticMethodInfo.Create(frame)?.Name}, Line: {frame.GetFileLineNumber()}");
+                stringBuilder.AppendLine($"File: {fileName}, Method: {DiagnosticMethodInfo.Create(frame)?.Name}, Line: {frame.GetFileLineNumber()}");
             }
         }