chore: make loop a property

Author: DA-344

discord/client.py

@@ -231,7 +231,7 @@ def __init__(
     ):
         # self.ws is set in the connect method
         self.ws: DiscordWebSocket = None  # type: ignore
-        self.loop: asyncio.AbstractEventLoop = loop
+        self._loop: asyncio.AbstractEventLoop = loop
         self._listeners: dict[str, list[tuple[asyncio.Future, Callable[..., bool]]]] = (
             {}
         )
@@ -323,6 +323,19 @@ def _get_state(self, **options: Any) -> ConnectionState:
     def _handle_ready(self) -> None:
         self._ready.set()
 
+    @property
+    def loop(self) -> asyncio.AbstractEventLoop:
+        """The event loop that the client uses for asynchronous operations."""
+        if self._loop is MISSING:
+            raise RuntimeError('loop is not set')
+        return self._loop
+
+    @loop.setter
+    def loop(self, value: asyncio.AbstractEventLoop) -> None:
+        if not isinstance(value, asyncio.AbstractEventLoop):
+            raise TypeError(f'expected a AbstractEventLoop object, got {value.__class__.__name__!r} instead')
+        self._loop = value
+
     @property
     def latency(self) -> float:
         """Measures latency between a HEARTBEAT and a HEARTBEAT_ACK in seconds. If no websocket