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/MRCC.Launcher/MRCC.Launcher.csproj

@@ -0,0 +1,31 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>WinExe</OutputType>
+        <TargetFramework>net10.0-windows</TargetFramework>
+        <UseWPF>true</UseWPF>
+        <EnableWindowsTargeting>true</EnableWindowsTargeting>
+        <RootNamespace>MRCC.Launcher</RootNamespace>
+        <AssemblyName>MRCC.Launcher</AssemblyName>
+        <Nullable>enable</Nullable>
+        <LangVersion>14.0</LangVersion>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <ApplicationManifest>app.manifest</ApplicationManifest>
+        <StartupObject>MRCC.Launcher.Program</StartupObject>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="CommunityToolkit.Mvvm" Version="8.4.2" />
+    </ItemGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="..\PCL-CE\PCL.Core\PCL.Core.csproj" />
+    </ItemGroup>
+
+    <ItemGroup>
+        <EmbeddedResource Include="metadata.json">
+            <LogicalName>PCL.metadata.json</LogicalName>
+        </EmbeddedResource>
+    </ItemGroup>
+
+</Project>