chore: add docstring to banner helper

Author: misrasaurabh1

codeflash/main.py

@@ -117,6 +117,12 @@ def _handle_config_loading(args: Namespace) -> Namespace | None:
 
 
 def print_codeflash_banner() -> None:
+    """Print the Codeflash banner with the branded styling.
+
+    Renders the Codeflash ASCII logo inside a non-expanding panel titled with
+    https://codeflash.ai, using bold gold text for visual emphasis.
+    """
+
     paneled_text(
         CODEFLASH_LOGO, panel_args={"title": "https://codeflash.ai", "expand": False}, text_args={"style": "bold gold3"}
     )