feat: 公开宿主组合加载 API、Forge 风格依赖版本区间与加载顺序、程序集解析策略

- ShrinkModComponentDiscovery.Discover 公开：只发现、不执行生命周期
- ShrinkModLoader.LoadComposed / ShrinkModCordisRuntime.ApplyComposedAsync：宿主提供元数据组合加载，支持纯数据包与 IShrinkModWrapper 公开真实实例
- 公开 TryAttachEventBusInstance，随生命周期逆操作释放
- 依赖新增 VersionRange（Maven/Forge 区间语法）与 Ordering（Before/After）
- AssemblyResolvePolicy 可限制跨模组程序集解析

Runtime/Metadata/ShrinkModDependencyAttribute.cs

@@ -2,12 +2,16 @@ using System;
 
 namespace ShrinkModFramework
 {
+    public enum ShrinkModDependencyOrdering { None, Before, After }
+
     [AttributeUsage(AttributeTargets.Class, AllowMultiple = true, Inherited = false)]
     public sealed class ShrinkModDependencyAttribute : Attribute
     {
         public string ModId { get; }
         public string MinimumVersion { get; }
         public bool Optional { get; }
+        public string VersionRange { get; set; }
+        public ShrinkModDependencyOrdering Ordering { get; set; } = ShrinkModDependencyOrdering.After;
 
         public ShrinkModDependencyAttribute(string modId, string minimumVersion = null, bool optional = false)
         {