fix(sync): use GlobalComponentRegistry for network sync decoding (#392)

- Decoder.ts now uses GlobalComponentRegistry.getComponentType() instead of local registry
- @sync decorator uses getComponentTypeName() to get @ECSComponent decorator name
- @ECSComponent decorator updates SYNC_METADATA.typeId when defined
- Removed deprecated registerSyncComponent/autoRegisterSyncComponent functions
- Updated ComponentSync.ts in network package to use GlobalComponentRegistry
- Updated tests to use correct @ECSComponent type names

This ensures that components decorated with @ECSComponent are automatically
available for network sync decoding without any manual registration.

packages/framework/server/src/ecs/index.ts

@@ -32,6 +32,9 @@
 export { ECSRoom } from './ECSRoom.js';
 export type { ECSRoomConfig } from './ECSRoom.js';
 
+// Re-export Player for convenience
+export { Player, type IPlayer } from '../room/Player.js';
+
 // Re-export commonly used ECS types for convenience
 export type {
     Entity,