Update commands to use the new slash command builder

- Updated app js to remove Emmelia remnants

Client/commands/leave.js

@@ -1,9 +1,22 @@
 const {getVoiceConnection} = require("@discordjs/voice");
 const {replyToInteraction} = require("../utilities/messageHandler.js");
+const { SlashCommandBuilder } = require('discord.js');
 // Debug
 const { DebugBuilder } = require("../utilities/debugBuilder.js");
 const log = new DebugBuilder("client-bot", "leave");
 
+module.exports = {
+	data: new SlashCommandBuilder()
+	.setName('leave')
+	.setDescription('Leave a voice channel'),
+	example: "leave",
+	isPrivileged: false,
+	async execute(interaction) {
+        await this.leave({ interaction: interaction })
+    }
+}
+
+
 /**
  * If in a voice channel for the specified guild, leave
  *