初始化 MiGu.Server 项目，包含基本的 ASP.NET Core 8 配置、JWT 鉴权、RBAC 权限管理、YARP 反向代理及相关配置文件。新增 build-and-run 脚本以简化构建与运行流程，添加 README 文档以指导用户快速上手。

MiGu.Server/MiGu.Server.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <RootNamespace>MiGu.Server</RootNamespace>
+    <AssemblyName>MiGu.Server</AssemblyName>
+    <LangVersion>latest</LangVersion>
+    <InvariantGlobalization>false</InvariantGlobalization>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="8.0.10" />
+    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.7.3" />
+    <PackageReference Include="Yarp.ReverseProxy" Version="2.2.0" />
+    <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="8.0.10" />
+    <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="8.0.2" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Include="data\.gitkeep" Condition="Exists('data\.gitkeep')" />
+  </ItemGroup>
+
+</Project>