add bytedance lighting model

gui.py

@@ -160,7 +160,7 @@ class GuiSD:
             mask_padding_a,
             adetailer_active_b,
             prompt_ad_b,
-            negative_prompt_ad_b,
+            negative_prompt_ad_b,   
             strength_ad_b,
             face_detector_ad_b,
             person_detector_ad_b,

models/format_models.py

@@ -1,4 +1,5 @@
 FORMAT_MODELS: list = [
+    "ByteDance/SDXL-Lightning",  # realistic
     'stablediffusionapi/mklan-xxx-nsfw-pony',
     'stabilityai/stable-diffusion-xl-base-1.0',
     'cagliostrolab/animagine-xl-3.1',