style(examples): apply ruff formatting to sample scripts

examples/get_user.py

@@ -2,6 +2,7 @@
 
 import lbc
 
+
 def main() -> None:
     # Initialize the Leboncoin API client
     client = lbc.Client()
@@ -16,5 +17,6 @@ def main() -> None:
     print("Pro status:", user.is_pro)
     print("Ads count:", user.total_ads)
 
+
 if __name__ == "__main__":
     main()