Hotbar Improvements + Item Action Integration Test (#2749)

* my IDE keeps wanting to change this so....

* Add item actions integration test, fix bug where empty item action
dict was left in SharedActionsComponent state

* bigger hotbar arrows

* nice wide hotbar pagination hitboxes

* add ability to switch hotbar loadout
via keybinds

* always highlight on drag over
of actions hotbar

* dont rely on content entity for integration test

Content.Client/GameObjects/Components/Mobs/ClientActionsComponent.cs

@@ -27,7 +27,7 @@ namespace Content.Client.GameObjects.Components.Mobs
     [ComponentReference(typeof(SharedActionsComponent))]
     public sealed class ClientActionsComponent : SharedActionsComponent
     {
-        public const byte Hotbars = 10;
+        public const byte Hotbars = 9;
         public const byte Slots = 10;
 
         [Dependency] private readonly IPlayerManager _playerManager = default!;
@@ -106,6 +106,11 @@ namespace Content.Client.GameObjects.Components.Mobs
             _ui?.HandleHotbarKeybind(slot, args);
         }
 
+        public void HandleChangeHotbarKeybind(byte hotbar, in PointerInputCmdHandler.PointerInputCmdArgs args)
+        {
+            _ui?.HandleChangeHotbarKeybind(hotbar, args);
+        }
+
         /// <summary>
         /// Updates the displayed hotbar (and menu) based on current state of actions.
         /// </summary>