Add planet scanner and octopus biome

buildings/ScannerBuildingVisual.gd

@@ -0,0 +1,26 @@
+extends Node2D
+
+const COLOR: Color = Color(0.35, 0.88, 1.0)
+
+
+func _ready() -> void:
+	set_process(false)
+	queue_redraw()
+
+
+func _draw() -> void:
+	# A broad dish on an open orbital truss. Static by design: scanning is a
+	# deliberate menu action, so a permanent sweep animation would promise
+	# background work that the building does not perform.
+	NeonDraw.draw_glowing_path(self, PackedVector2Array([
+		Vector2(-58, -34), Vector2(-34, 12), Vector2(12, 30),
+	]), COLOR, 0.9, 0.7)
+	NeonDraw.draw_glowing_line(self, Vector2(-31, 12), Vector2(-12, 62),
+		COLOR, 0.9, 0.7)
+	NeonDraw.draw_glowing_line(self, Vector2(-52, 62), Vector2(30, 62),
+		COLOR, 0.9, 0.7)
+	NeonDraw.draw_glowing_circle(self, Vector2(-25, 4), 7.0,
+		Color(0.95, 0.3, 0.72), 1.0, Color(0.06, 0.02, 0.12))
+	for radius in [34.0, 52.0, 70.0]:
+		draw_arc(Vector2(-30, 3), radius, -1.15, -0.18, 18,
+			COLOR, 2.2, true)