init command now adds default stylesheet and asks for confirmation to overwrite config

src/zona/config.py

@@ -8,7 +8,7 @@ def find_config(start: Path | None = None) -> Path | None:
     current = (start or Path.cwd()).resolve()
 
     for parent in [current, *current.parents]:
-        candidate = parent / "zona.yml"
+        candidate = parent / "config.yml"
         if candidate.is_file():
             return candidate
     return None