Remove obsolete implementation and simplify project structure

src/anyimage/server/outputs/surface.py

@@ -0,0 +1,35 @@
+from pathlib import Path
+
+
+def write_surface_archive(mesh, output_path):
+    import numpy as np
+
+    output_path = Path(output_path)
+    output_path.parent.mkdir(parents=True, exist_ok=True)
+    np.savez_compressed(
+        output_path,
+        vertices=mesh.vertices,
+        faces=mesh.faces,
+        uv=mesh.uv,
+        intrinsics=mesh.intrinsics,
+        image_size=np.asarray(mesh.image_size, dtype=np.int32),
+        reference_depth=np.asarray(mesh.reference_depth, dtype=np.float32),
+        **mesh.point_attributes,
+        **mesh.face_attributes,
+    )
+    return output_path
+
+
+def write_normal_texture(normal, output_path):
+    import numpy as np
+    from PIL import Image
+
+    normal_rgb = np.clip(
+        (normal * np.array([1.0, -1.0, -1.0], dtype=np.float32) + 1.0)
+        * 127.5,
+        0.0,
+        255.0,
+    ).astype(np.uint8)
+    output_path = Path(output_path)
+    Image.fromarray(normal_rgb, mode="RGB").save(output_path)
+    return output_path