Biome rework (#37735)

* DungeonData rework

Back to fields, serializes better, just make new layers dumby.

* wawawewa

* Fix this

* Fixes

* Port the work over

* wawawewa

* zoom

* Kinda workin

* Adjust wawa

* Unloading work

* Ore + entitytable fixes

Iterate every dungeon not just last.

* Big shot

* wawawewa

* Fixes

* true

* Fixes

# Conflicts:
#	Content.Server/Procedural/DungeonJob/DungeonJob.cs

* wawawewa

* Fixes

* Fix

* Lot of work

* wawawewa

* Fixing

* eh?

* a

* Fix a heap of stuff

* Better ignored check

* Reserve tile changes

* biome

* changes

* wawawewa

* Fixes & snow

* Shadow fixes

* wawawewa

* smol

* Add layer API

* More work

* wawawewa

* Preloads and running again

* wawawewa

* Modified

* Replacements and command

* Runtime support

* werk

* Fix expeds + dungeon alltiles

* reh

---------

Co-authored-by: Nemanja <98561806+EmoGarbage404@users.noreply.github.com>

Content.Server/NPC/Pathfinding/PathfindingSystem.Simple.cs

@@ -65,6 +65,9 @@ public sealed partial class PathfindingSystem
                 {
                     for (var y = -1; y <= 1; y++)
                     {
+                        if (x == 0 && y == 0)
+                            continue;
+
                         var neighbor = node + new Vector2i(x, y);
                         var neighborCost = OctileDistance(node, neighbor) * args.TileCost?.Invoke(neighbor) ?? 1f;
 
@@ -121,8 +124,7 @@ public sealed partial class PathfindingSystem
                         cameFrom[neighbor] = node;
                         costSoFar[neighbor] = gScore;
 
-                        // Still use octile even for manhattan distance.
-                        var hScore = OctileDistance(args.End, neighbor) * 1.001f;
+                        var hScore = ManhattanDistance(args.End, neighbor);
                         var fScore = gScore + hScore;
                         frontier.Enqueue(neighbor, fScore);
                     }