Added styles to Processed

So `[styles]` pattern can use in saving image UI.

modules/processing.py

@@ -121,6 +121,7 @@ class Processed:
         self.denoising_strength = getattr(p, 'denoising_strength', None)
         self.extra_generation_params = p.extra_generation_params
         self.index_of_first_image = index_of_first_image
+        self.styles = p.styles
 
         self.eta = p.eta
         self.ddim_discretize = p.ddim_discretize
@@ -165,6 +166,7 @@ class Processed:
             "extra_generation_params": self.extra_generation_params,
             "index_of_first_image": self.index_of_first_image,
             "infotexts": self.infotexts,
+            "styles": self.styles,
         }
 
         return json.dumps(obj)