Add RoomFill markers (#22293)

* Add RoomFill markers

* weh

* Also deez

* Working

* Randomised fills working

* Fixes

* Fix lack of prototypes

* Fix tests

* Fix tests?

Content.Server/Procedural/RoomFillComponent.cs

@@ -0,0 +1,37 @@
+using Content.Shared.Procedural;
+using Content.Shared.Whitelist;
+using Robust.Shared.Prototypes;
+
+namespace Content.Server.Procedural;
+
+/// <summary>
+/// Marker that indicates the specified room prototype should occupy this space.
+/// </summary>
+[RegisterComponent]
+public sealed partial class RoomFillComponent : Component
+{
+    /// <summary>
+    /// Are we allowed to rotate room templates?
+    /// If the room is not a square this will only do 180 degree rotations.
+    /// </summary>
+    [DataField]
+    public bool Rotation = true;
+
+    /// <summary>
+    /// Size of the room to fill.
+    /// </summary>
+    [DataField(required: true)]
+    public Vector2i Size;
+
+    /// <summary>
+    /// Rooms allowed for the marker.
+    /// </summary>
+    [DataField]
+    public EntityWhitelist? RoomWhitelist;
+    
+    /// <summary>
+    /// Should any existing entities / decals be bulldozed first.
+    /// </summary>
+    [DataField]
+    public bool ClearExisting;
+}