Compose vessels from definitions and capabilities

InterceptorRangeUpgrade.tres

@@ -0,0 +1,11 @@
+[gd_resource type="Resource" script_class="VesselUpgradeDefinition" load_steps=2 format=3]
+[ext_resource type="Script" path="res://VesselUpgradeDefinition.gd" id="1"]
+[resource]
+script = ExtResource("1")
+upgrade_id = "int_range"
+display_name = "Targeting Array"
+description = "+60 firing range per level."
+base_cost = 20
+max_level = 3
+icon = 17
+additive_modifiers = {"fire_range": 60.0}