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

src/events/guildMemberAdd.ts

@@ -0,0 +1,13 @@
+import { Events } from "discord.js";
+import type { Event } from "@lib/types";
+
+const event: Event<Events.GuildMemberAdd> = {
+    name: Events.GuildMemberAdd,
+    execute: async (member) => {
+        const role = member.guild.roles.cache.find(role => role.name === "Visitor");
+        if (!role) return;
+        await member.roles.add(role);
+    },
+};
+
+export default event;