feat: 项目初始化 + 3D方块世界原型 + AI助搭系统

初始化 monorepo: Go后端(7微服务) + Unity客户端(9模块) + 启动器

HTML5原型: Three.js 3D体素世界, Perlin噪声地形, 原版材质, 22种方块

Minecraft创造模式背包: 双栏布局, 拖拽移动物品, 方向性元件引脚

AI助搭策划文档 + 客户端/服务端骨架 + Docker Compose + CI

launcher/PCL-CE/PCL.Core/Utils/Hash/SHA1Provider.cs

@@ -0,0 +1,40 @@
+using System;
+using System.IO;
+using System.Security.Cryptography;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace PCL.Core.Utils.Hash;
+
+public class SHA1Provider : IHashProvider
+{
+    public static SHA1Provider Instance { get; } = new();
+    public int Length => 40;
+
+    public byte[] ComputeHash(byte[] input)
+    {
+        return SHA1.HashData(input);
+    }
+
+    public byte[] ComputeHash(ReadOnlySpan<byte> input)
+    {
+        return SHA1.HashData(input);
+    }
+
+    public byte[] ComputeHash(string input, Encoding? encoding = null)
+    {
+        encoding ??= Encoding.UTF8;
+        return ComputeHash(encoding.GetBytes(input));
+    }
+
+    public byte[] ComputeHash(Stream input)
+    {
+        return SHA1.HashData(input);
+    }
+
+    public async ValueTask<byte[]> ComputeHashAsync(Stream input, CancellationToken cancellationToken = default)
+    {
+        return await SHA1.HashDataAsync(input, cancellationToken).ConfigureAwait(false);
+    }
+}