Add root_logger setting to Client.run

This allows people one way to use the colour logger globally

discord/client.py

@@ -810,6 +810,7 @@ class Client:
         log_handler: Optional[logging.Handler] = MISSING,
         log_formatter: logging.Formatter = MISSING,
         log_level: int = MISSING,
+        root_logger: bool = False,
     ) -> None:
         """A blocking call that abstracts away the event loop
         initialisation from you.
@@ -861,6 +862,14 @@ class Client:
             only controls the library's log level. To control the root logger's level,
             you can use ``logging.getLogger().setLevel(level)``.
 
+            .. versionadded:: 2.0
+        root_logger: :class:`bool`
+            Whether to set up the root logger rather than the library logger.
+            By default, only the library logger (``'discord'``) is set up. If this
+            is set to ``True`` then the root logger is set up as well.
+
+            Defaults to ``False``.
+
             .. versionadded:: 2.0
         """
 
@@ -890,6 +899,11 @@ class Client:
             logger.setLevel(log_level)
             logger.addHandler(log_handler)
 
+            if root_logger:
+                logger = logging.getLogger()
+                logger.setLevel(log_level)
+                logger.addHandler(log_handler)
+
         try:
             asyncio.run(runner())
         except KeyboardInterrupt: