Check for message proxied through PluralKit

Signed-off-by: TheKodeToad <TheKodeToad@proton.me>

src/utils/pluralKit.ts

@@ -0,0 +1,10 @@
+import { Message } from "discord.js";
+
+export async function proxied(message: Message): Promise<boolean> {
+    if (message.webhookId !== null)
+        return false;
+
+    await new Promise(resolve => setTimeout(resolve, 300));
+    const response = await fetch(`https://api.pluralkit.me/v2/messages/${message.id}`);
+    return response.ok;
+}