🐛 fix(GenerationContext.py): fix indentation issue in process() method

✨ feat(GenerationContext.py): add support for z-index of moviepy clips to improve video rendering
The indentation issue in the process() method has been fixed. The z-index of moviepy clips has been added to improve the rendering of the video. This allows the clips to be rendered in different layers based on their index, resulting in a more visually appealing video.

src/engines/AssetsEngine/AssetsEngineSelector.py

@@ -33,4 +33,4 @@ class AssetsEngineSelector:
             assets_opts = [asset for asset in assets if asset["engine"] == engine.name]
             assets_opts = [asset["args"] for asset in assets_opts]
             clips.extend(engine.get_assets(assets_opts))
-        return clips
+        self.ctx.index_3.extend(clips)