Add player joining

In the platformer scene, whenever you connect a new keyboard or controller, or interact with one already connected, a new player will be created and tied to that input device. Please try to break this system to make sure it works properly.

Assets/PlayerManager.cs

@@ -0,0 +1,31 @@
+using UnityEngine;
+using UnityEngine.InputSystem;
+
+public class PlayerManager : MonoBehaviour
+{
+    [SerializeField] private Vector2 spawnPosition;
+
+    private PlatformerCameraMovement playerCamera;
+
+    private void Start()
+    {
+        GetComponent<PlayerInputManager>().onPlayerJoined += OnPlayerJoined;
+        GetComponent<PlayerInputManager>().onPlayerLeft += OnPlayerLeft;
+
+        playerCamera = FindFirstObjectByType<PlatformerCameraMovement>();
+    }
+
+    private void OnPlayerJoined(PlayerInput playerInput)
+    {
+        playerInput.transform.position = spawnPosition;
+        playerCamera.players.Add(playerInput.gameObject);
+        print("Player joined");
+    }
+
+    private void OnPlayerLeft(PlayerInput playerInput)
+    {
+        Destroy(playerInput.gameObject);
+        playerCamera.players.Remove(playerInput.gameObject);
+        print("Player left");
+    }
+}