feat(bot-discord): mute and unmute command

apps/bot-discord/src/events/guildMemberAdd.js

@@ -0,0 +1,20 @@
+import { Events } from 'discord.js';
+
+export default {
+	name: Events.GuildMemberAdd,
+	once: false,
+	async execute(_, config, member) {       
+       const mute = await client.db.collection('mute').findOne({
+           guild_id: member.guild.id,
+           user_id: member.id
+       });
+
+       if (mute) {
+           // Add the roles given.
+           member.roles.add(mute.support_mute ?
+                config.mute.supportGiveRoles :
+                config.mute.giveRoles
+            );
+       }
+	}
+};