Move scale command to content and turn it into a toolshed command (#39349)

* scale command

* fix namespaces

Content.Shared/Sprite/SharedScaleVisualsSystem.cs

@@ -0,0 +1,77 @@
+using System.Numerics;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.Sprite;
+
+public abstract class SharedScaleVisualsSystem : EntitySystem
+{
+    [Dependency] private readonly SharedAppearanceSystem _appearance = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<ScaleVisualsComponent, MapInitEvent>(OnMapInit);
+        SubscribeLocalEvent<ScaleVisualsComponent, ComponentShutdown>(OnComponentShutdown);
+    }
+
+    private void OnMapInit(Entity<ScaleVisualsComponent> ent, ref MapInitEvent args)
+    {
+        SetSpriteScale(ent.Owner, ent.Comp.Scale);
+    }
+
+    private void OnComponentShutdown(Entity<ScaleVisualsComponent> ent, ref ComponentShutdown args)
+    {
+        ResetScale(ent);
+    }
+
+    protected virtual void ResetScale(Entity<ScaleVisualsComponent> ent)
+    {
+        var ev = new ScaleEntityEvent(ent.Owner, Vector2.One);
+        RaiseLocalEvent(ent.Owner, ref ev);
+    }
+
+    /// <summary>
+    /// Used to set the <see cref="Robust.Client.GameObjects.SpriteComponent.Scale"/> datafield to a certain value from the server.
+    /// </summary>
+    public void SetSpriteScale(EntityUid uid, Vector2 scale)
+    {
+        var comp = EnsureComp<ScaleVisualsComponent>(uid);
+        comp.Scale = scale;
+        Dirty(uid, comp);
+
+        var appearanceComponent = EnsureComp<AppearanceComponent>(uid);
+        _appearance.SetData(uid, ScaleVisuals.Scale, scale, appearanceComponent);
+
+        // Raise an event for content use.
+        var ev = new ScaleEntityEvent(uid, scale);
+        RaiseLocalEvent(uid, ref ev);
+    }
+
+    /// <summary>
+    /// Gets the current scale set by <see cref="SetSpriteScale"/>.
+    /// This does not include any direct changes made to the SpriteComponent.
+    /// </summary>
+    public Vector2 GetSpriteScale(EntityUid uid)
+    {
+        if (!TryComp<AppearanceComponent>(uid, out var appearanceComponent))
+            return Vector2.One;
+
+        if (!_appearance.TryGetData<Vector2>(uid, ScaleVisuals.Scale, out var scale, appearanceComponent))
+            scale = Vector2.One;
+
+        return scale;
+    }
+}
+
+/// <summary>
+/// Raised when a sprite scale is changed.
+/// </summary>
+[ByRefEvent]
+public readonly record struct ScaleEntityEvent(EntityUid Uid, Vector2 Scale);
+
+[Serializable, NetSerializable]
+public enum ScaleVisuals : byte
+{
+    Scale,
+}