NPC refactor (#10122)

Co-authored-by: metalgearsloth <metalgearsloth@gmail.com>

Content.Client/Weapons/Ranged/Systems/GunSystem.cs

@@ -235,8 +235,19 @@ public sealed partial class GunSystem : SharedGunSystem
 
     protected override void CreateEffect(EntityUid uid, MuzzleFlashEvent message, EntityUid? user = null)
     {
-        if (!Timing.IsFirstTimePredicted || !TryComp<TransformComponent>(uid, out var xform)) return;
-        var ent = Spawn(message.Prototype, xform.Coordinates);
+        if (!Timing.IsFirstTimePredicted)
+            return;
+
+        EntityCoordinates coordinates;
+
+        if (message.MatchRotation)
+            coordinates = new EntityCoordinates(uid, Vector2.Zero);
+        else if (TryComp<TransformComponent>(uid, out var xform))
+            coordinates = xform.Coordinates;
+        else
+            return;
+
+        var ent = Spawn(message.Prototype, coordinates);
 
         var effectXform = Transform(ent);
         effectXform.LocalRotation -= MathF.PI / 2;