Shitty combat mode & animations. (#367)

* Combat mode UI & targeting zones.

* Fix inventory hud positioning.

* Crappy attack animations.

* Import TG combat sounds

* More work on arcs.

* Implement hit sounds.

* Lunging, hit effects, some more stuff.

Content.Client/GameObjects/EntitySystems/CombatModeSystem.cs

@@ -0,0 +1,33 @@
+using Content.Client.UserInterface;
+using Content.Shared.GameObjects.Components.Mobs;
+using Content.Shared.GameObjects.EntitySystemMessages;
+using Robust.Shared.GameObjects.Systems;
+using Robust.Shared.IoC;
+
+namespace Content.Client.GameObjects.EntitySystems
+{
+    public sealed class CombatModeSystem : EntitySystem
+    {
+#pragma warning disable 649
+        [Dependency] private readonly IGameHud _gameHud;
+#pragma warning restore 649
+
+        public override void Initialize()
+        {
+            base.Initialize();
+
+            _gameHud.OnCombatModeChanged = OnCombatModeChanged;
+            _gameHud.OnTargetingZoneChanged = OnTargetingZoneChanged;
+        }
+
+        private void OnTargetingZoneChanged(TargetingZone obj)
+        {
+            RaiseNetworkEvent(new CombatModeSystemMessages.SetTargetZoneMessage(obj));
+        }
+
+        private void OnCombatModeChanged(bool obj)
+        {
+            RaiseNetworkEvent(new CombatModeSystemMessages.SetCombatModeActiveMessage(obj));
+        }
+    }
+}