Add numpy monkey patch for facexlib compatibility on modern Python/NumPy 2.x

app.py

@@ -1,5 +1,11 @@
 import os, sys
 import gradio as gr
+import numpy as np
+
+# Monkey patch for facexlib on NumPy 1.24+ / 2.0+
+if not hasattr(np, 'float'):
+    np.float = float
+
 from src.gradio_demo import SadTalker