feat(memory): refactor allocation and add new queue

Refactored memory management by removing safety checks and introducing `MemoryHandle` for centralized tracking. Simplified allocation logic across allocators and enhanced `Dispose` methods for better resource cleanup.

Added `UnsafeChunkedQueue<T>`, a lock-free, dynamically resizing queue with chunk-based memory management, supporting parallel producers and consumers.

Updated unit tests to validate new queue functionality and ensure compatibility with refactored memory logic. Incremented assembly version to 1.6.12.

BREAKING CHANGE: Removed `#if MHP_ENABLE_SAFETY_CHECKS` blocks, altering memory validation behavior.

Misaki.HighPerformance.LowLevel/Buffer/VirtualArena.cs

@@ -232,14 +232,18 @@ public unsafe struct VirtualArena : IMemoryAllocator<VirtualArena, VirtualArena.
 
     public void Dispose()
     {
-        if (_baseAddress != null)
+        if (_baseAddress == null)
         {
-            Munmap(_baseAddress, _reserveCapacity);
-
-            _baseAddress = null;
-            _reserveCapacity = 0;
-            _committedSize = 0;
-            _allocatedOffset = 0;
+            return;
         }
+
+        var ptr = _baseAddress;
+
+        _baseAddress = null;
+        _allocatedOffset = 0;
+        _committedSize = 0;
+        _reserveCapacity = 0;
+
+        Munmap(ptr, _reserveCapacity);
     }
 }