feat: set status to idle appropriately

tasks.py

@@ -0,0 +1,28 @@
+import asyncio
+import time
+
+import disnake
+
+from state import client, last_used, players
+
+
+async def check_idle():
+    while True:
+        await asyncio.sleep(3600)
+
+        if time.time() - last_used >= 3600:
+            await client.change_presence(status=disnake.Status.idle)
+        else:
+            await client.change_presence(status=disnake.Status.online)
+
+
+async def cleanup():
+    while True:
+        await asyncio.sleep(3600)
+
+        targets = []
+        for id, player in players:
+            if len(player.queue) == 0:
+                targets.append(id)
+        for target in targets:
+            del players[target]