Added basic build menu and placement

data/buildings/building_base.gd

@@ -0,0 +1,13 @@
+extends Node2D
+class_name BuildingBase
+
+var _building_data: Building
+
+@onready var sprite_2d: Sprite2D = $Sprite2D
+
+func initialize(data: Building, grid_location: Vector2i) -> void:
+	_building_data = data
+	position = Grid.grid_to_world_center(grid_location)
+
+func _ready() -> void:
+	sprite_2d.texture = _building_data.atlas_texture