perf(bot): ⚡ Use one process per shard.

Start one process per shard and initialize a new one if any of them fails.

run.py

@@ -1,5 +1,51 @@
-from payphone import bot
-from payphone.core import config
+def shard(shard_id: int, shard_count: int) -> None:
+    """Starts a new shard.
+
+    Args:
+        shard_id (int): The shard's ID.
+        shard_count (int): The total amount of shards.
+    """
+
+    from payphone.bot import bot
+    from payphone.core import config
+
+    bot.shard_ids = [shard_id]
+    bot.shard_count = shard_count
+
+    bot.run(config.TOKEN)
 
 
-bot.bot.run(config.TOKEN)
+if __name__ == "__main__":
+    import multiprocessing as mp
+
+    import time
+
+    import httpx
+
+    from payphone.core import config
+
+    response = httpx.get(
+        "https://discord.com/api/v10/gateway/bot",
+        headers={"Authorization": f"Bot {config.TOKEN}"},
+    )
+
+    info = response.json()
+
+    shard_count = info["shards"]
+
+    ps: list[mp.Process] = [
+        mp.Process(target=shard, args=(i, shard_count)) for i in range(shard_count)
+    ]
+
+    for p in ps:
+        p.start()
+
+        time.sleep(5)
+
+    while True:
+        for i in range(shard_count):
+            if not ps[i].is_alive():
+                ps[i] = mp.Process(target=shard, args=(i, shard_count))
+                ps[i].start()
+
+        time.sleep(5)