chore: auto-commit (5 archivos)

- CMakeLists.txt
- app.md
- appicon.ico
- backend/
- main.cpp

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

backend/backends/hunyuan3d_2.py

@@ -0,0 +1,23 @@
+"""Backend Hunyuan3D-2 (Tencent, Community License).
+
+STUB. Para implementar: clonar github.com/Tencent/Hunyuan3D-2 a sources/,
+instalar deps, cargar pipeline shape + texture.
+"""
+from __future__ import annotations
+
+from typing import Any, Dict
+from PIL import Image
+
+
+class Handle:
+    def infer(self, image: Image.Image, cfg: Dict[str, Any]) -> bytes:
+        raise NotImplementedError(
+            "hunyuan3d-2 backend pendiente. Ver notebook 03_smoke_hunyuan3d.ipynb"
+        )
+
+    def close(self) -> None:  # pragma: no cover
+        return
+
+
+def load() -> Handle:
+    return Handle()