Refactor command handling to use CommandDefinition type and improve interaction processing

src/commands/utility/ping.ts

@@ -1,10 +1,13 @@
 import { ChatInputCommandInteraction, SlashCommandBuilder } from "discord.js";
+import { CommandDefinition } from "../../type";
 
-export default {
+const cmd : CommandDefinition = {
     data: new SlashCommandBuilder()
         .setName('ping')
         .setDescription('Pong again!'),
     async execute(interaction : ChatInputCommandInteraction) {
         await interaction.reply('Pong !');
     }
-}
+}
+
+export default cmd;