WIP Make collections thread-safe and add safe iteration

Replaced static lists and dictionaries with thread-safe ConcurrentDictionary or ThreadLocal collections for various item components and systems. Updated all relevant code to use snapshots (ToArray, ToList) for safe iteration, and added helper methods for marking and clearing changed connections. These changes improve thread safety and prevent potential concurrency issues in multi-threaded scenarios.

Barotrauma/BarotraumaShared/SharedSource/Items/Components/Door.cs

@@ -2,6 +2,7 @@
 using FarseerPhysics;
 using Microsoft.Xna.Framework;
 using System;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Linq;
 using FarseerPhysics.Dynamics;
@@ -14,9 +15,9 @@ namespace Barotrauma.Items.Components
 {
     partial class Door : Pickable, IDrawableComponent, IServerSerializable
     {
-        private static readonly HashSet<Door> doorList = new HashSet<Door>();
+        private static readonly ConcurrentDictionary<Door, byte> _doorDict = new ConcurrentDictionary<Door, byte>();
 
-        public static IReadOnlyCollection<Door> DoorList { get { return doorList; } }
+        public static ICollection<Door> DoorList => _doorDict.Keys;
 
         private Gap linkedGap;
         private bool isOpen;
@@ -277,7 +278,7 @@ namespace Barotrauma.Items.Components
             }
                         
             IsActive = true;
-            doorList.Add(this);
+            _doorDict.TryAdd(this, 0);
         }
 
         public override void OnItemLoaded()
@@ -669,7 +670,7 @@ namespace Barotrauma.Items.Components
             convexHull2?.Remove();
 #endif
 
-            doorList.Remove(this);
+            _doorDict.TryRemove(this, out _);
         }
 
         private bool CheckSubmarinesInDoorWay()