feat: Implement dynamic event loading and refactor event handlers into dedicated files.

src/events/messageCreate.ts

@@ -0,0 +1,19 @@
+import { Events } from "discord.js";
+import { userService } from "@/modules/user/user.service";
+import { levelingService } from "@/modules/leveling/leveling.service";
+import type { Event } from "@lib/types";
+
+const event: Event<Events.MessageCreate> = {
+    name: Events.MessageCreate,
+    execute: async (message) => {
+        if (message.author.bot) return;
+        if (!message.guild) return;
+
+        const user = await userService.getUserById(message.author.id);
+        if (!user) return;
+
+        levelingService.processChatXp(message.author.id);
+    },
+};
+
+export default event;