Add utils + refacto

Assets/Unheimlich_POC/Scripts/Handlers/Interactions/PlayerInspectionHandler.cs

@@ -1,14 +1,18 @@
 using System.Collections;
 using UnityEngine;
 using UnityEngine.InputSystem;
+using Unheimlich.Core;
 using Unheimlich.Gameplay.Items;
 using InputManager = Unheimlich.Managers.PlayerInputManager;
 
 namespace Unheimlich.Interactions.Core
 {
-    public class PlayerInspectionHandler : MonoBehaviour
+    /// <summary>
+    /// Handles player item inspection mode.
+    /// When inspecting, disables player movement and allows item rotation using look input.
+    /// </summary>
+    public class PlayerInspectionHandler : Singleton<PlayerInspectionHandler>
 {
-    public static PlayerInspectionHandler Instance { get; private set; }
 
     [Header("Components")]
     [SerializeField] private Transform _inspectionHoldPoint; 
@@ -19,21 +23,7 @@ namespace Unheimlich.Interactions.Core
 
     private Coroutine _interactionListener;
     private bool _isUsingGamepad = false;
-
-    private void Awake()
-    {
-        if (Instance != null && Instance != this)
-        {
-            Destroy(this);
-            return;
-        }
-        Instance = this;
-    }
     
-    /// <summary>
-    /// Toggles inspection mode for an item. When inspecting, disables player movement
-    /// and allows item rotation using look input until interaction key is pressed again.
-    /// </summary>
     public void ToggleInspection(InspectableItem item)
     {
         if (!IsInspecting)