Allow passing an iterable of mobjects to add() without unpacking

Author: irvanalhaq9

manim/scene/scene.py

@@ -464,6 +464,9 @@ def add(self, *mobjects: Mobject):
             The same scene after adding the Mobjects in.
 
         """
+        # Allows passing an iterable of mobjects without unpacking it first
+        mobjects = flatten_iterable_parameters(mobjects)
+        
         if config.renderer == RendererType.OPENGL:
             new_mobjects = []
             new_meshes = []