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/Components/Weapons/Melee/MeleeWeaponArcAnimationComponent.cs

@@ -0,0 +1,67 @@
+using Content.Shared.GameObjects.Components.Weapons.Melee;
+using Robust.Client.GameObjects;
+using Robust.Client.Graphics;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Maths;
+
+namespace Content.Client.GameObjects.Components.Weapons.Melee
+{
+    [RegisterComponent]
+    public sealed class MeleeWeaponArcAnimationComponent : Component
+    {
+        public override string Name => "MeleeWeaponArcAnimation";
+
+        private MeleeWeaponAnimationPrototype _meleeWeaponAnimation;
+
+        private float _timer;
+        private SpriteComponent _sprite;
+        private Angle _baseAngle;
+
+        public override void Initialize()
+        {
+            base.Initialize();
+
+            _sprite = Owner.GetComponent<SpriteComponent>();
+        }
+
+        public void SetData(MeleeWeaponAnimationPrototype prototype, Angle baseAngle)
+        {
+            _meleeWeaponAnimation = prototype;
+            _sprite.AddLayer(new RSI.StateId(prototype.State));
+            _baseAngle = baseAngle;
+        }
+
+        internal void Update(float frameTime)
+        {
+            if (_meleeWeaponAnimation == null)
+            {
+                return;
+            }
+
+            _timer += frameTime;
+
+            var (r, g, b, a) =
+                Vector4.Clamp(_meleeWeaponAnimation.Color + _meleeWeaponAnimation.ColorDelta * _timer, Vector4.Zero, Vector4.One);
+            _sprite.Color = new Color(r, g, b, a);
+
+            switch (_meleeWeaponAnimation.ArcType)
+            {
+                case WeaponArcType.Slash:
+                    var angle = Angle.FromDegrees(_meleeWeaponAnimation.Width)/2;
+                    Owner.Transform.LocalRotation =
+                        _baseAngle + Angle.Lerp(-angle, angle, (float) (_timer / _meleeWeaponAnimation.Length.TotalSeconds));
+                    break;
+
+                case WeaponArcType.Poke:
+                    _sprite.Offset += (_meleeWeaponAnimation.Speed * frameTime, 0);
+                    break;
+            }
+
+
+            if (_meleeWeaponAnimation.Length.TotalSeconds <= _timer)
+            {
+                Owner.Delete();
+            }
+        }
+    }
+}