allow loading embeddings from subdirectories

modules/textual_inversion/textual_inversion.py

@@ -149,9 +149,10 @@ class EmbeddingDatabase:
             else:
                 self.skipped_embeddings[name] = embedding
 
-        for fn in os.listdir(self.embeddings_dir):
+        for root, dirs, fns in os.walk(self.embeddings_dir):
+            for fn in fns:
                 try:
-                fullfn = os.path.join(self.embeddings_dir, fn)
+                    fullfn = os.path.join(root, fn)
 
                     if os.stat(fullfn).st_size == 0:
                         continue