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>

project.godot

@@ -0,0 +1,42 @@
+; Engine configuration file.
+; It's best edited using the editor UI and not directly,
+; since the parameters that go here are not all obvious.
+;
+; Format:
+;   [section] ; section goes between []
+;   param=value ; assign values to parameters
+
+config_version=5
+
+[application]
+
+config/name="Spaceship Test"
+run/main_scene="res://Main.tscn"
+config/features=PackedStringArray("4.7")
+config/icon="res://icon.svg"
+
+[autoload]
+
+GameState="*res://GameState.gd"
+
+[display]
+
+window/size/viewport_width=720
+window/size/viewport_height=1280
+window/stretch/mode="canvas_items"
+window/stretch/aspect="expand"
+window/handheld/orientation="portrait"
+
+[gui]
+
+theme/custom="res://ui_theme.tres"
+theme/default_font_size=78
+
+[input_devices]
+
+pointing/emulate_touch_from_mouse=true
+
+[rendering]
+
+renderer/rendering_method="gl_compatibility"
+environment/defaults/default_clear_color=Color(0.02, 0.02, 0.08, 1)