Make energy swords use RgbLightController (#7344)

Content.Client/Toggleable/ToggleableLightVisualsComponent.cs

@@ -0,0 +1,33 @@
+using Content.Shared.Hands.Components;
+using static Robust.Shared.GameObjects.SharedSpriteComponent;
+
+namespace Content.Client.Toggleable;
+
+/// <summary>
+///     Component that handles the toggling the visuals of some light emitting entity.
+/// </summary>
+/// <remarks>
+///     This will toggle the visibility of layers on an entity's sprite, the in-hand visuals, and the clothing/equipment
+///     visuals. This will modify the color of any attached point lights.
+/// </remarks>
+[RegisterComponent]
+public sealed class ToggleableLightVisualsComponent : Component
+{
+    /// <summary>
+    ///     Sprite layer that will have it's visibility toggled when this item is toggled.
+    /// </summary>
+    [DataField("spriteLayer")]
+    public string SpriteLayer = "light";
+
+    /// <summary>
+    ///     Layers to add to the sprite of the player that is holding this entity (while the component is toggled on).
+    /// </summary>
+    [DataField("inhandVisuals")]
+    public Dictionary<HandLocation, List<PrototypeLayerData>> InhandVisuals = new();
+
+    /// <summary>
+    ///     Layers to add to the sprite of the player that is wearing this entity (while the component is toggled on).
+    /// </summary>
+    [DataField("clothingVisuals")]
+    public readonly Dictionary<string, List<PrototypeLayerData>> ClothingVisuals = new();
+}