Refactor memory management with MemoryHandle

Replaced `SafeHandle` with a new `MemoryHandle` system for improved memory tracking, safety, and leak detection. Updated allocators (`ArenaAllocator`, `HeapAllocator`, `StackAllocator`) and collections (`UnTypedArray`, `UnsafeArray<T>`, `UnsafeBitSet`) to use `MemoryHandle`.

Refactored `AllocationManager` to use `ConcurrentSlotMap` for live allocation tracking and added methods for managing `MemoryHandle` instances. Simplified alignment and padding logic across allocators and collections.

Enhanced performance with optimized memory operations (`MemClear`, `MemSet`, `MemCpy`) and vectorized operations in `MemoryUtility` and `UnsafeBitSet`. Fixed alignment issues in vectorized memory operations.

Updated tests to reflect the new memory management system and added new tests for `UnsafeBitSet` bitwise operations. Enabled `ENABLE_COLLECTION_CHECKS` for debug builds and improved error messages and documentation.

Removed unused `SafeHandle` code and adjusted project configuration to include necessary references.

Misaki.HighPerformance.LowLevel/Misaki.HighPerformance.LowLevel.csproj

@@ -15,12 +15,17 @@
 
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
     <IsAotCompatible>True</IsAotCompatible>
+    <DefineConstants>$(DefineConstants);ENABLE_COLLECTION_CHECKS</DefineConstants>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
     <IsAotCompatible>True</IsAotCompatible>
   </PropertyGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\Misaki.HighPerformance\Misaki.HighPerformance.csproj" />
+  </ItemGroup>
+
   <ItemGroup>
     <None Update="Collections\FixedText.tt">
       <Generator>TextTemplatingFileGenerator</Generator>