Update app.py

Added the import statements that were deleted by accident before.

app.py

@@ -1,3 +1,19 @@
+import sys
+import spaces
+sys.path.append("flash3d")  # Add the flash3d directory to the system path for importing local modules
+
+from omegaconf import OmegaConf
+import gradio as gr
+import torch
+import torchvision.transforms as TT
+import torchvision.transforms.functional as TTF
+from huggingface_hub import hf_hub_download
+import numpy as np
+
+from networks.gaussian_predictor import GaussianPredictor
+from util.vis3d import save_ply
+
+
 def main():
     print("[INFO] Starting main function...")
     if torch.cuda.is_available():