feat: Luban.Core初步实现，提供能力：

- RegistService 装饰器实现服务注册
- 下载服务
- 文件服务
- 多线程方法
- 解压缩服务

src/LubanHub.Core/ServiceCollectionExtensions.cs

@@ -0,0 +1,80 @@
+using LubanHub.Core.Attributes;
+using Microsoft.Extensions.DependencyInjection;
+using System;
+using System.Linq;
+using System.Net.Http;
+using System.Reflection;
+
+namespace LubanHub.Core;
+
+/// <summary>
+/// Core服务依赖注入扩展
+/// </summary>
+public static class ServiceCollectionExtensions
+{
+    /// <summary>
+    /// 添加Core服务 - 通过反射自动发现并注册带有RegistService特性的服务
+    /// </summary>
+    public static IServiceCollection AddCoreServices(this IServiceCollection services)
+    {
+        // 注册HttpClient（Core服务的依赖）
+        services.AddSingleton<HttpClient>();
+        
+        // 获取当前程序集
+        var assembly = Assembly.GetExecutingAssembly();
+        
+        // 发现所有带有RegistService特性的类型
+        var serviceTypes = assembly.GetTypes()
+            .Where(type => type.IsClass && !type.IsAbstract && type.GetCustomAttribute<RegistServiceAttribute>() != null)
+            .Select(type => new
+            {
+                Type = type,
+                Attribute = type.GetCustomAttribute<RegistServiceAttribute>()!
+            })
+            .OrderBy(x => x.Attribute.Priority) // 按优先级排序
+            .ToList();
+
+        // 注册服务
+        foreach (var serviceInfo in serviceTypes)
+        {
+            var implementationType = serviceInfo.Type;
+            var attribute = serviceInfo.Attribute;
+            
+            // 确定服务接口类型
+            Type serviceType;
+            if (attribute.ServiceType != null)
+            {
+                // 使用特性指定的服务类型
+                serviceType = attribute.ServiceType;
+            }
+            else
+            {
+                // 自动推断：查找实现的第一个接口
+                var interfaceType = implementationType.GetInterfaces().FirstOrDefault();
+                if (interfaceType == null)
+                {
+                    throw new InvalidOperationException($"服务 {implementationType.Name} 没有实现任何接口，且未在RegistService特性中指定ServiceType");
+                }
+                serviceType = interfaceType;
+            }
+            
+            // 根据生命周期注册服务
+            switch (attribute.Lifetime)
+            {
+                case ServiceLifetime.Singleton:
+                    services.AddSingleton(serviceType, implementationType);
+                    break;
+                case ServiceLifetime.Scoped:
+                    services.AddScoped(serviceType, implementationType);
+                    break;
+                case ServiceLifetime.Transient:
+                    services.AddTransient(serviceType, implementationType);
+                    break;
+                default:
+                    throw new ArgumentOutOfRangeException(nameof(attribute.Lifetime), attribute.Lifetime, "不支持的服务生命周期");
+            }
+        }
+        
+        return services;
+    }
+}