✨ feat: 初始化飞拍替换方案仓库骨架

* 建立 .NET 8 解决方案及分层项目结构
* 添加 Flyshot.Core.Domain 领域模型（机器人、轨迹、运动学）
* 添加 Flyshot.Core.Planning 规划层（ICSP、CubicSpline、采样器）
* 添加 Flyshot.Core.Triggering 触发时序与 IO 时间轴
* 添加 Flyshot.Core.Config 配置兼容与 .robot 解析
* 添加 Flyshot.Server.Host 最小宿主及 /healthz 端点
* 补充单元测试与集成测试项目
* 添加 CLAUDE.md、AGENTS.md、README.md 项目规范

tests/Flyshot.Server.IntegrationTests/Flyshot.Server.IntegrationTests.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+
+    <IsPackable>false</IsPackable>
+    <IsTestProject>true</IsTestProject>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="8.0.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.0" />
+    <PackageReference Include="xunit" Version="2.4.2" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="coverlet.collector" Version="6.0.0">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\Flyshot.Server.Host\Flyshot.Server.Host.csproj" />
+  </ItemGroup>
+
+</Project>

tests/Flyshot.Server.IntegrationTests/GlobalUsings.cs

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+global using Xunit;

tests/Flyshot.Server.IntegrationTests/HealthEndpointTests.cs

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+using System.Net;
+using System.Text.Json;
+using Microsoft.AspNetCore.Mvc.Testing;
+
+namespace Flyshot.Server.IntegrationTests;
+
+public sealed class FlyshotServerFactory : WebApplicationFactory<Program>;
+
+public sealed class HealthEndpointTests(FlyshotServerFactory factory) : IClassFixture<FlyshotServerFactory>
+{
+    [Fact]
+    public async Task GetHealthz_ReturnsOkPayload()
+    {
+        using var client = factory.CreateClient();
+
+        using var response = await client.GetAsync("/healthz");
+
+        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
+
+        await using var responseStream = await response.Content.ReadAsStreamAsync();
+        using var jsonDocument = await JsonDocument.ParseAsync(responseStream);
+        var root = jsonDocument.RootElement;
+
+        Assert.Equal("ok", root.GetProperty("status").GetString());
+        Assert.Equal("flyshot-server-host", root.GetProperty("service").GetString());
+    }
+}