Croissant Cinnamon Buns

Name: Croissant Cinnamon Buns
Ingredients: 1/3 cup all-purpose flour; 1 cup milk; 7 g active dry yeast (not instant); ¼ cup warm water; 4 cups all-purpose flour; ½ cup granulated sugar; 2 large eggs (room temperature); ¼ cup vegetable oil; ½ tsp salt; 2/3 cup unsalted butter (room temperature); 1/3 cup unsalted butter (melted); 1 cup brown sugar; 1 tbsp ground cinnamon; ½ cup diced apple (optional); 1/3 cup chopped pecans (optional); 1/3 cup raisins (optional); 250 g cream cheese (room temperature); 1 ½ cups powdered sugar; 1 tsp vanilla extract; ¼ cup milk; ½ cup chopped pecans (optional)