docs: update examples to remove deprecated print_result parameter

Author: zigai

README.md

@@ -46,12 +46,12 @@ uv add "git+https://github.com/zigai/interfacy.git"
 ```python
 from interfacy import Interfacy
 
-def greet(name: str, times: int = 1) -> str:
-    """Return a greeting."""
-    return " ".join([f"Hello, {name}!" for _ in range(times)])
+def greet(name: str, times: int = 1) -> None:
+    """Print a greeting."""
+    print(" ".join([f"Hello, {name}!" for _ in range(times)]))
 
 if __name__ == "__main__":
-    Interfacy(print_result=True).run(greet)
+    Interfacy().run(greet)
 ```
 
 ```text

docs/api/parsers.md

@@ -1,15 +1,13 @@
 # Parsers
 
-`Interfacy` is the programmatic entry point. It defaults to the argparse
-backend. Pass `backend="click"` when you want Click integration.
+`Interfacy` is the programmatic entry point.
 
 ## Interfacy
 
 ```python
 from interfacy import Interfacy
 
-Interfacy(print_result=True).run(main)
-Interfacy(backend="click", print_result=True).run(main)
+Interfacy().run(main)
 ```
 
 ```{eval-rst}

interfacy/.agents/skills/interfacy/SKILL.md

@@ -26,20 +26,17 @@ uv add interfacy
 ```python
 from interfacy import Interfacy
 
-def greet(name: str, times: int = 1) -> str:
-    """Return a greeting.
+def greet(name: str, times: int = 1) -> None:
+    """Print a greeting.
 
     Args:
         name: Person to greet.
         times: Number of greetings.
-
-    Returns:
-        Greeting text.
     """
-    return " ".join(f"Hello, {name}!" for _ in range(times))
+    print(" ".join(f"Hello, {name}!" for _ in range(times)))
 
 if __name__ == "__main__":
-    Interfacy(print_result=True).run(greet)
+    Interfacy().run(greet)
 ```
 
 ```text