working on multiplayer

Runtime/Engine/Code/Steam/SteamManager.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Threading;
+using Cysharp.Threading.Tasks;
+using R3;
+using RebootKit.Engine.Main;
+using RebootKit.Engine.Multiplayer;
+using Steamworks;
+using Logger = RebootKit.Engine.Foundation.Logger;
+
+namespace RebootKit.Engine.Steam {
+    static class SteamManager {
+        static readonly Logger s_Logger = new Logger(nameof(SteamManager));
+        
+        public static bool IsInitialized { get; private set; } = false;
+        
+        public static INetworkTransport NetworkTransport { get; private set; } = new SteamNetworkTransport();
+        
+        internal static async UniTask InitializeAsync(CancellationToken cancellationToken = default) {
+            s_Logger.Info("Initializing Steam Manager...");
+            IsInitialized = false;
+
+            try {
+                SteamClient.Init(RR.EngineConfig.steamAppID, true);
+            } catch (Exception ex) {
+                s_Logger.Error($"Failed to initialize Steam Client: {ex.Message}");
+                return;
+            }
+            
+            NetworkTransport.Initialize();
+            
+            IsInitialized = true;
+
+            await UniTask.Yield(cancellationToken);
+        }
+        
+        internal static void Shutdown() {
+            if (!IsInitialized) {
+                s_Logger.Error("Steam Manager is not initialized. Skipping operation.");
+                return;
+            }
+            
+            s_Logger.Info("Shutting down Steam Manager...");
+            
+            NetworkTransport.Shutdown();
+            SteamClient.Shutdown();
+
+            IsInitialized = false;
+        }
+    }
+}