Compose buildings from definitions and capabilities

ExtractorBuildingDefinition.tres

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+[gd_resource type="Resource" script_class="BuildingDefinition" load_steps=2 format=3]
+[ext_resource type="Script" path="res://BuildingDefinition.gd" id="1"]
+[resource]
+script = ExtResource("1")
+definition_id = "extractor"
+display_name = "Extractor"
+description = "Mines resources into local storage for transport vessels to collect. It keeps extracting while you are away."
+cost = 25
+action_icon = 11
+menu_icon = 11
+capabilities = PackedStringArray("extraction")
+map_color = Color(1, 0.85, 0.3, 1)
+menu_button_name = "ExtractorButton"
+menu_label_name = "ExtractorLabel"
+menu_cost_name = "ExtractorCost"
+placement_mode = "planet"