feat: protocol 767 (1.21) packet handling and AttributeSubComponent update

- Add AttributeSubComponent121 that uses ResourceLocation(string) instead
  of UUID+Name, matching the 1.21 attribute modifier wire format change.
  Register it in SubComponentRegistry121 via new ReplaceSubComponent method.
- Add ProjectilePower packet handler: reads 1 double (accelerationPower)
  for 1.21+, or 3 doubles (xPower/yPower/zPower) for 1.20.6.
- Add CustomReportDetails and ServerLinks packet handlers in both Play
  and Configuration phases, consuming all fields to prevent byte offset
  errors on 1.21 servers.

Made-with: Cursor

MinecraftClient/Protocol/Handlers/StructuredComponents/Core/SubComponentRegistry.cs

@@ -16,6 +16,11 @@ public abstract class SubComponentRegistry(DataTypes dataTypes)
         _subComponentParsers.Add(name, typeof(T));
     }
 
+    protected void ReplaceSubComponent<T>(string name) where T : SubComponent
+    {
+        _subComponentParsers[name] = typeof(T);
+    }
+
     public SubComponent ParseSubComponent(string name, Queue<byte> data)
     {
         if(!_subComponentParsers.TryGetValue(name, out var subComponentParserType))