ninja 2 electric boogaloo (#15534)

Co-authored-by: deltanedas <@deltanedas:kde.org>

Content.Client/Ninja/Systems/NinjaSystem.cs

@@ -0,0 +1,12 @@
+using Content.Shared.Ninja.Systems;
+
+namespace Content.Client.Ninja.Systems;
+
+/// <summary>
+/// Currently does nothing special clientside.
+/// All functionality is in shared and server.
+/// Only exists to prevent crashing.
+/// </summary>
+public sealed class SpaceNinjaSystem : SharedSpaceNinjaSystem
+{
+}