Initial commit: SpaceshipTest, a top-down space RTS in Godot 4.7.1

A fleet of neon-outlined ships explores a procedurally generated, seeded
infinite world: tap/joystick steering, pinch zoom, formation pivoting,
planet landings, an ore economy with extractors and haulers, and player
built structures (mothership, ship crafter, command centre).

All art is hand-drawn with draw_* calls rather than textures, and the
backgrounds are camera-relative shaders so they stay precise at large
world coordinates.

Includes a 35-test headless suite (tests/run_tests.sh) plus screenshot
tooling that renders real frames through Xvfb and Mesa softpipe, since
--headless has no GPU.

Excluded from version control: .godot/ (import cache, and it holds
export credentials), builds/, android/build/ and packaged APKs - all
regenerable, and ~325 MB combined.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Hauler.gd

@@ -0,0 +1,39 @@
+extends Node2D
+
+# Purely visual: an automated ore hauler running an extractor's route. It
+# carries no state of its own - GameState owns the simulation and this node
+# is created, positioned and freed to match it. See HaulerField.
+
+const HULL_COLOR: Color = Color(0.55, 0.85, 0.4)
+
+var laden: bool = false
+
+
+func _ready() -> void:
+	add_to_group("haulers")
+	z_index = -1
+	queue_redraw()
+
+
+func set_laden(value: bool) -> void:
+	if laden == value:
+		return
+	laden = value
+	queue_redraw()
+
+
+func _draw() -> void:
+	# Blunt freighter silhouette - deliberately unlike the player's sharp
+	# triangles, so it is obvious at a glance this is not a fleet vessel.
+	var hull: PackedVector2Array = PackedVector2Array([
+		Vector2(0, -20), Vector2(11, -6), Vector2(11, 16), Vector2(-11, 16), Vector2(-11, -6),
+	])
+	NeonDraw.draw_glowing_polygon(self, hull, HULL_COLOR, 1.0)
+	if laden:
+		# Ore in the hold on the outbound leg, so a glance tells you which
+		# way it is going.
+		var cargo: PackedVector2Array = PackedVector2Array()
+		for i in range(6):
+			var a: float = (float(i) / 6.0) * TAU - PI / 2.0
+			cargo.append(Vector2(cos(a), sin(a)) * 6.0 + Vector2(0, 4))
+		NeonDraw.draw_glowing_polygon(self, cargo, Color(0.0, 0.62, 0.7), 1.0)