feat: GameEngineWorker

@sammo/server/src/GameEngineDefs.ts

@@ -1,6 +1,6 @@
 import type { RPCLists } from "@sammo/server_util";
 import type { ActionRequest, ActionResult } from "./GameEngine.js";
-
+import type { MessagePort } from "node:worker_threads";
 
 
 export type GameEngineRPCDefs = {
@@ -15,4 +15,13 @@ type WorkerUpdate = {
     lastExecuted: string,
 }
 
-export type GameEngineMsg = WorkerUpdate;
+export type GameEngineMsg = WorkerUpdate;
+
+
+type WorkerInit = {
+    type: 'init',
+    port: MessagePort,
+    guid: string,
+}
+
+export type GameEngineWorkerMsg = WorkerInit;