Implement player network spawning and position synchronization

Assets/Scripts/Managers/ConnectionManager.cs

@@ -0,0 +1,54 @@
+using Sirenix.OdinInspector;
+using System.Collections;
+using System.Collections.Generic;
+using Unity.Netcode;
+using UnityEngine;
+using Zenject;
+
+public class ConnectionManager : NetworkBehaviour
+{
+    [SerializeField]
+    private NetworkManager networkManager;
+
+    [Inject]
+    [SerializeField]
+    [ReadOnly]
+    private GameManager gameManager;
+
+    private void Start()
+    {
+        networkManager.OnClientConnectedCallback += OnClientConnectedCallback;
+        networkManager.OnClientDisconnectCallback += OnClientDisconnectCallback;
+    }
+
+    private void OnClientConnectedCallback(ulong clientId)
+    {
+        Debug.Log($"Client-{clientId} is connected and can spawn {nameof(NetworkObject)}s.");
+
+        if (networkManager.LocalClientId == clientId)
+        {
+            StartCoroutine(SpawnLocalPlayer());
+        }
+    }
+
+    private IEnumerator SpawnLocalPlayer()
+    {
+        yield return new WaitForEndOfFrame();
+
+        var playerObject = networkManager.LocalClient.PlayerObject;
+        var player = playerObject.GetComponent<PlayerComponent>();
+        player.gameManager = gameManager;
+        gameManager.PlayerSpawnedOnNetwork(player);
+        yield return null;
+    }
+
+    private void OnClientDisconnectCallback(ulong clientId)
+    {
+        Debug.Log($"Client-{clientId} is disconnected and can spawn {nameof(NetworkObject)}s.");
+
+        if (networkManager.LocalClientId == clientId)
+        {
+            
+        }
+    }
+}