Add a lantern and a radiating light component (#1571)

* added a lantern

* Add A Lantern with radiating light

* Update meta.json

Added copyright information for lantern.rsi

Content.Client/GameObjects/Components/RadiatingLightComponent.cs

@@ -0,0 +1,46 @@
+using System;
+using Robust.Client.Animations;
+using Robust.Client.GameObjects;
+using Robust.Client.GameObjects.Components.Animations;
+using Robust.Shared.Animations;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Maths;
+
+namespace Content.Client.GameObjects.Components
+{
+    [RegisterComponent]
+    public class RadiatingLightComponent : Component
+    {
+        public override string Name => "RadiatingLight";
+
+        protected override void Startup()
+        {
+            base.Startup();
+
+            var animation = new Animation
+            {
+                Length = TimeSpan.FromSeconds(4),
+                AnimationTracks =
+                {
+                    new AnimationTrackComponentProperty
+                    {
+                        ComponentType = typeof(PointLightComponent),
+                        InterpolationMode = AnimationInterpolationMode.Linear,
+                        Property = nameof(PointLightComponent.Radius),
+                        KeyFrames =
+                        {
+                            new AnimationTrackProperty.KeyFrame(3.0f, 0),
+                            new AnimationTrackProperty.KeyFrame(2.0f, 1),
+                            new AnimationTrackProperty.KeyFrame(3.0f, 2)
+                        }
+                    }
+                }
+            };
+
+            var playerComponent = Owner.EnsureComponent<AnimationPlayerComponent>();
+            playerComponent.Play(animation, "emergency");
+
+            playerComponent.AnimationCompleted += s => playerComponent.Play(animation, s);
+        }
+    }
+}