Split 2D and 3D scripts

- Moved data structure code to /scripts

scripts/3d/data_map.gd

@@ -1,5 +0,0 @@
-extends Resource
-class_name DataMap
-
-@export var cash:int = 10000
-@export var structures:Array[DataStructure]

scripts/3d/data_structure.gd

@@ -1,6 +0,0 @@
-extends Resource
-class_name DataStructure
-
-@export var position:Vector2i
-@export var orientation:int
-@export var structure:int

scripts/3d/structure.gd

@@ -1,8 +0,0 @@
-extends Resource
-class_name Structure
-
-@export_subgroup("Model")
-@export var model:PackedScene # Model of the structure
-
-@export_subgroup("Gameplay")
-@export var price:int # Price of the structure when building