✨ 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/HealthEndpointTests.cs

@@ -0,0 +1,27 @@
+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());
+    }
+}