Recipe example from readme added to examples, with a new pretty string formatting

examples/cooking_recipe_example.py

@@ -0,0 +1,40 @@
+from pydantic import BaseModel
+import simplemind as sm
+
+
+class InstructionStep(BaseModel):
+    step_number: int
+    instruction: str
+
+class RecipeIngredient(BaseModel):
+    name: str
+    quantity: float
+    unit: str
+
+class Recipe(BaseModel):
+    name: str
+    ingredients: list[RecipeIngredient]
+    instructions: list[InstructionStep]
+    
+    def __str__(self) -> str:
+        output = f"\n=== {self.name.upper()} ===\n\n"
+        
+        output += "INGREDIENTS:\n"
+        for ing in self.ingredients:
+            output += f"• {ing.quantity} {ing.unit} {ing.name}\n"
+        
+        output += "\nINSTRUCTIONS:\n"
+        for step in self.instructions:
+            output += f"{step.step_number}. {step.instruction}\n"
+        
+        return output
+    
+
+recipe = sm.generate_data(
+    "Write a recipe for chocolate chip cookies",
+    llm_model="gpt-4o-mini",
+    llm_provider="openai",
+    response_model=Recipe,
+)
+
+print(recipe)