Improve memory safety and alignment handling

- Updated `.gitignore` to include `.vscode/` and clarified comments.
- Introduced `SafeHandle` for managing memory alignment and safe access.
- Refactored `UnsafeArray<T>` to add bounds checking and alignment logic.
- Added `IUnsafeHashCollection<T>` for specialized hash-based collections.
- Refactored `UnsafeHashMap<TKey, TValue>` and `UnsafeHashSet<T>` to use `HashMapHelper<TKey>` with alignment support.
- Made `UnsafeSlotMap<T>` methods `readonly` for immutability.
- Enhanced `HashMapHelper<TKey>` with alignment-aware buffer management and validation.
- Updated benchmarks to use `UnsafeArray<Vector256<int>>` and added capacity checks.
- Incremented assembly version to `1.1.3` in `Misaki.HighPerformance.LowLevel.csproj`.
- Updated `Program.cs` to run `CollectionBenchmark` and demonstrate safe disposal handling.

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

@@ -6,7 +6,7 @@
     <Nullable>enable</Nullable>
     <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
     <Authors>Misaki</Authors>
-    <AssemblyVersion>1.1.2</AssemblyVersion>
+    <AssemblyVersion>1.1.3</AssemblyVersion>
     <Version>$(AssemblyVersion)</Version>
     <GeneratePackageOnBuild>True</GeneratePackageOnBuild>
     <PackageProjectUrl>https://git.personalnas.com/Misaki/Misaki.HighPerformance.git</PackageProjectUrl>