LockVisualizer (#25224)

* LockVisualizer

* Fix state

* Clean some code

* Make it component, fix tests fail

* Fix for StateUnlocked

Now it is possible to manually set the unlocked state and it will work!

* Optimize LockVisualizer, add check for unlocked state

* No todo I guess

(cherry picked from commit c7870882f6f956eea07cbb4738ae45c8805c8ce6)

Content.Client/Lock/Visualizers/LockVisualizerSystem.cs

@@ -0,0 +1,38 @@
+using Content.Shared.Storage;
+using Content.Shared.Lock;
+using Robust.Client.GameObjects;
+
+namespace Content.Client.Lock.Visualizers;
+
+public sealed class LockVisualizerSystem : VisualizerSystem<LockVisualsComponent>
+{
+    protected override void OnAppearanceChange(EntityUid uid, LockVisualsComponent comp, ref AppearanceChangeEvent args)
+    {
+        if (args.Sprite == null
+            || !AppearanceSystem.TryGetData<bool>(uid, LockVisuals.Locked, out _, args.Component))
+            return;
+
+        // Lock state for the entity.
+        if (!AppearanceSystem.TryGetData<bool>(uid, LockVisuals.Locked, out var locked, args.Component))
+            locked = true;
+
+        var unlockedStateExist = args.Sprite.BaseRSI?.TryGetState(comp.StateUnlocked, out _);
+
+        if (AppearanceSystem.TryGetData<bool>(uid, StorageVisuals.Open, out var open, args.Component))
+        {
+            args.Sprite.LayerSetVisible(LockVisualLayers.Lock, !open);
+        }
+        else if (!(bool) unlockedStateExist!)
+            args.Sprite.LayerSetVisible(LockVisualLayers.Lock, locked);
+
+        if (!open && (bool) unlockedStateExist!)
+        {
+            args.Sprite.LayerSetState(LockVisualLayers.Lock, locked ? comp.StateLocked : comp.StateUnlocked);
+        }
+    }
+}
+
+public enum LockVisualLayers : byte
+{
+    Lock
+}