feat(sdk): migrate to EventBus 2.0

Replace the legacy EventBase runtime with generated multi-bus bindings and explicit scheduling. Migrate app, data, network, demo, and mod consumers; add generated network-event registration and owner-scoped mod content overrides.

Assets/Modules/ShrinkModFramework/Editor/Scaffolding/InRepoModTemplate/Runtime/__PROJECT_NAME__Contracts.cs.txt

@@ -5,7 +5,7 @@ using ShrinkNetwork;
 
 namespace __ROOT_NAMESPACE__
 {
-    public sealed class __PROJECT_NAME__Event : EventBase
+    public sealed class __PROJECT_NAME__Event : IShrinkEvent
     {
         public string Message { get; set; } = string.Empty;
     }

Assets/Modules/ShrinkModFramework/Editor/Scaffolding/InRepoModTemplate/Runtime/__PROJECT_NAME__Mod.cs.txt

@@ -8,10 +8,10 @@ using ShrinkNetwork;
 namespace __ROOT_NAMESPACE__
 {
     [ShrinkMod("__MOD_ID__", "__DISPLAY_NAME__", "1.0.0")]
-    [EventBusSubscriber]
+    [ShrinkEventSubscriber(OwnerId = "__MOD_ID__", DefaultBus = "mod:__MOD_ID__")]
     [ShrinkCommandSubscriber]
     [ShrinkNetworkSubscriber]
-    public sealed class __PROJECT_NAME__Mod : ShrinkModBase
+    public sealed partial class __PROJECT_NAME__Mod : ShrinkModBase
     {
         private readonly RuntimeState _state = new();
 
@@ -22,11 +22,7 @@ namespace __ROOT_NAMESPACE__
 
         public override void OnRegisterContent(ShrinkModContext context)
         {
-            var registry = context.GetRegistry<string>("example.items");
-            registry.Register(
-                context.ModInfo.ModId,
-                context.ModInfo.ModId + ":example_item",
-                "__DISPLAY_NAME__ Item");
+            context.RegisterContent("example.items", "example_item", "__DISPLAY_NAME__ Item");
         }
 
         public override void OnInitialize(ShrinkModContext context)
@@ -38,7 +34,7 @@ namespace __ROOT_NAMESPACE__
             });
         }
 
-        [EventSubscribe]
+        [ShrinkSubscribe]
         private void OnExampleEvent(__PROJECT_NAME__Event evt)
         {
             _state.LastEventMessage = evt.Message ?? string.Empty;