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/App/ConfigEnums.cs

@@ -0,0 +1,116 @@
+namespace PCL.Core.App;
+
+/// <summary>
+/// 联机协议偏好
+/// </summary>
+public enum LinkProtocolPreference
+{
+    Tcp,
+    Udp
+}
+
+/// <summary>
+/// 主题模式（亮/暗/系统）
+/// </summary>
+public enum ColorMode
+{
+    Light = 0,
+    Dark = 1,
+    System = 2
+}
+
+/// <summary>
+/// 配色主题
+/// </summary>
+public enum ColorTheme
+{
+    SkyBlue = 0,
+    CatBlue = 1,
+    DeathBlue = 2,
+    HmclBlue = 3
+}
+
+/// <summary>
+/// 更新通道
+/// </summary>
+public enum UpdateChannel
+{
+    Release = 0,
+    Beta = 1,
+    Dev = 2
+}
+
+/// <summary>
+/// 游戏窗口大小模式
+/// </summary>
+public enum GameWindowSizeMode
+{
+    Fullscreen = 0,
+    Default = 1,
+    Launcher = 2,
+    Custom = 3,
+    Maximized = 4
+}
+
+/// <summary>
+/// 游戏进程优先级
+/// </summary>
+public enum GameProcessPriority
+{
+    AboveNormal = 0,
+    Normal = 1,
+    BelowNormal = 2,
+    High = 3,
+    RealTime = 4
+}
+
+/// <summary>
+/// 游戏启动后启动器可见性
+/// </summary>
+public enum LauncherVisibility
+{
+    ExitImmediately = 0,
+    ObsoleteCaseDoNotUse = 1,
+    HideAndExit = 2,
+    HideAndReopen = 3,
+    MinimizeAndReopen = 4,
+    DoNothing = 5
+}
+
+/// <summary>
+/// JVM 优先 IP 栈类型
+/// </summary>
+public enum JvmPreferredIpStack
+{
+    PreferV4 = 0,
+    Default = 1,
+    PreferV6 = 2
+}
+
+/// <summary>
+/// 联机中继行为
+/// </summary>
+public enum LinkRelayBehavior
+{
+    Default = 0,
+    ForceRelay = 1
+}
+
+/// <summary>
+/// 启动器更新行为
+/// </summary>
+public enum LauncherAutoUpdateBehavior
+{
+    DownloadAndInstall = 0,
+    DownloadAndAnnounce = 1,
+    AnnounceOnly = 2,
+    Disable = 3
+}
+
+public enum LauncherTitleType
+{
+    None = 0,
+    Default = 1,
+    Text = 2,
+    Image = 3
+}