v1.0: film and scene data

• halo_film_1080p30.mp4: the 45 s drone film, 1920x1080 at 30 fps, rendered from the 3D scene at 8 sub-frames per frame. Music: "Uprising" by Scott Buckley (www.scottbuckley.com.au), licensed under CC BY 4.0, edited to 45 s with a fade-out.
• halo-data.tar.gz: the baked scene data (terrain levels, lights, cloud noise volumes, sky dome, textures). npm run data downloads and unpacks it into data/.