treefmt/ruff: Set python lint version to 3.13. Fix all new lints coming up.

pkgs/clan-cli/docs.py

@@ -1,5 +1,6 @@
 import argparse
 import sys
+import re
 from dataclasses import dataclass
 from pathlib import Path
 
@@ -118,9 +119,6 @@ def epilog_to_md(text: str) -> str:
     return md
 
 
-import re
-
-
 def contains_https_link(line: str) -> bool:
     pattern = r"https://\S+"
     return re.search(pattern, line) is not None