Don't include type files in build

src/types/handler.d.ts

@@ -0,0 +1,10 @@
+import { Client, Interaction } from 'discord.js';
+
+type HandlerFunction = (client: Client, interaction: Interaction, ...args: any) => Promise<void>
+
+export interface Handler {
+  name: string;
+  handler: HandlerFunction;
+  init?: (client: Client) => Promise<void>;
+  autoComplete?: HandlerFunction;
+}