Refactor resource management and update project configs

- Use `using` for MeshNode disposal in MeshAssetHandler
- Switch to `ref` UnsafeList in meshlet hierarchy methods for perf
- Ensure proper disposal of UnsafeList<int> and TempBinaryNode
- Add launchSettings.json for Ghost.Editor.Core debugging
- Update GhostEngine.slnx with platform mappings for Editor.Core
- Remove MHP_ENABLE_SAFETY_CHECKS from Debug|AnyCPU in csproj

src/Runtime/Ghost.Core/Ghost.Core.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
-    <DefineConstants>$(DefineConstants);MHP_ENABLE_SAFETY_CHECKS;MHP_ENABLE_MIMALLOC;MHP_FASTMATH</DefineConstants>
+    <DefineConstants>$(DefineConstants);MHP_ENABLE_MIMALLOC;MHP_FASTMATH</DefineConstants>
     <IsAotCompatible>True</IsAotCompatible>
     <IsTrimmable>True</IsTrimmable>
   </PropertyGroup>