Add message when --quiet is used

gui-uv.sh

@@ -47,5 +47,9 @@ if ! command -v uv &> /dev/null; then
   fi
 fi
 
+if [[ "$uv_quiet" == "--quiet" ]]; then
+  echo "Notice: uv will run in quiet mode. No indication of the uv module download and install process will be displayed."
+fi
+
 git submodule update --init --recursive
 uv run $uv_quiet kohya_gui.py --noverify "${args[@]}"