Don't include type files in build

src/types/command.d.ts

@@ -0,0 +1,9 @@
+import { Client, ContextMenuCommandBuilder, SlashCommandBuilder } from 'discord.js';
+import { Handler } from './handler';
+
+export type CommandBuilder = ContextMenuCommandBuilder | SlashCommandBuilder;
+
+export interface Command extends Handler {
+  data: CommandBuilder | ((client: Client) => Promise<CommandBuilder>);
+  guilds?: string[];
+}