Add comprehensive documentation for SnapForm extension

- Created development.md for development setup and licensing information.
- Added features.md detailing functionalities and usage instructions for developers and users.
- Introduced index.md to serve as a navigation hub for the documentation.
- Developed outputs.md to explain output formats and their specifications.
- Established service.md to describe the AI Service architecture and environment setup.
- Created surface.md to outline the process of converting Image Empty to perspective meshes.

tools/validate_moge_depth_plane.py

@@ -80,6 +80,7 @@ def main():
     ]
     assert image_textures
     assert all(node.extension == "EXTEND" for node in image_textures)
+    assert any(node.image.name == "MoGe Test.depth" for node in image_textures)
     geometry_textures = [
         node
         for node in geometry_group.nodes