Avoid accidental creation of multiple fileproxies (#22)

Add the fileproxy on top of standard stream only if one was not already added.

src/enrich/console.py

@@ -32,8 +32,10 @@ def __init__(self, *args: str, redirect: bool = True, **kwargs: Any) -> None:
         self.extended = True
 
         if self.redirect:
-            sys.stdout = FileProxy(self, sys.stdout)  # type: ignore
-            sys.stderr = FileProxy(self, sys.stderr)  # type: ignore
+            if not hasattr(sys.stdout, "rich_proxied_file"):
+                sys.stdout = FileProxy(self, sys.stdout)  # type: ignore
+            if not hasattr(sys.stderr, "rich_proxied_file"):
+                sys.stderr = FileProxy(self, sys.stderr)  # type: ignore
 
     # https://github.com/python/mypy/issues/4441
     def print(self, *args, **kwargs) -> None:  # type: ignore