Allow Aghosts to load biomes. (#36325)

* init

* review

Content.Server/Parallax/BiomeSystem.cs

@@ -16,6 +16,7 @@ using Content.Shared.Light.Components;
 using Content.Shared.Parallax.Biomes;
 using Content.Shared.Parallax.Biomes.Layers;
 using Content.Shared.Parallax.Biomes.Markers;
+using Content.Shared.Tag;
 using Microsoft.Extensions.ObjectPool;
 using Robust.Server.Player;
 using Robust.Shared;
@@ -50,6 +51,7 @@ public sealed partial class BiomeSystem : SharedBiomeSystem
     [Dependency] private readonly SharedPhysicsSystem _physics = default!;
     [Dependency] private readonly SharedTransformSystem _transform = default!;
     [Dependency] private readonly ShuttleSystem _shuttles = default!;
+    [Dependency] private readonly TagSystem _tags = default!;
 
     private EntityQuery<BiomeComponent> _biomeQuery;
     private EntityQuery<FixturesComponent> _fixturesQuery;
@@ -59,6 +61,7 @@ public sealed partial class BiomeSystem : SharedBiomeSystem
     private readonly HashSet<EntityUid> _handledEntities = new();
     private const float DefaultLoadRange = 16f;
     private float _loadRange = DefaultLoadRange;
+    private static readonly ProtoId<TagPrototype> AllowBiomeLoadingTag = "AllowBiomeLoading";
 
     private List<(Vector2i, Tile)> _tiles = new();
 
@@ -321,7 +324,7 @@ public sealed partial class BiomeSystem : SharedBiomeSystem
 
     private bool CanLoad(EntityUid uid)
     {
-        return !_ghostQuery.HasComp(uid);
+        return !_ghostQuery.HasComp(uid) || _tags.HasTag(uid, AllowBiomeLoadingTag);
     }
 
     public override void Update(float frameTime)