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/Loading/ShrinkHarmonyPatchService.cs

@@ -88,7 +88,7 @@ namespace ShrinkModFramework
         private static IDisposable ApplyPatchesCore(ShrinkModInfo modInfo, bool enableHarmonyPatching,
             bool verboseLogging, bool reversible)
         {
-            if (!enableHarmonyPatching || !modInfo.AutoApplyHarmonyPatches)
+            if (!enableHarmonyPatching || !modInfo.AutoApplyHarmonyPatches || modInfo.EntryType == null)
                 return EmptyLease.Instance;
 
             var harmonyType = Type.GetType("HarmonyLib.Harmony, 0Harmony");