Improves the HUD (#3655)

* All good except the combat doll

* Makes the HUD inventory less terrible

* Cleanup, nuke the Combat Mode button

* Harm icon

* Switch the icon

* Basic goon hud

* Toggleable

* Nuke the popup, properly centers it

* Fix clicking the button

* Nuke some old code

* missed a comment

* Remove defaults

* Localization

* Nuke some old yaml

* New sprites

Co-authored-by: ike709 <sparebytes@protonmail.com>

Content.Server/Actions/CombatMode.cs

@@ -0,0 +1,28 @@
+#nullable enable
+using Content.Server.GameObjects.Components.Mobs;
+using Content.Shared.Actions;
+using Content.Shared.Interfaces;
+using JetBrains.Annotations;
+using Robust.Shared.Localization;
+using Robust.Shared.Serialization.Manager.Attributes;
+
+namespace Content.Server.Actions
+{
+    [UsedImplicitly]
+    [DataDefinition]
+    public class CombatMode : IToggleAction
+    {
+        public bool DoToggleAction(ToggleActionEventArgs args)
+        {
+            if (!args.Performer.TryGetComponent(out CombatModeComponent? combatMode))
+            {
+                return false;
+            }
+
+            args.Performer.PopupMessage(args.ToggledOn ? Loc.GetString("hud-combat-enabled") : Loc.GetString("hud-combat-disabled"));
+            combatMode.IsInCombatMode = args.ToggledOn;
+
+            return true;
+        }
+    }
+}