feat: GuildBanManager (#5276)

Co-authored-by: Sugden <28943913+NotSugden@users.noreply.github.com>
Co-authored-by: Jan <66554238+vaporox@users.noreply.github.com>
Co-authored-by: izexi <43889168+izexi@users.noreply.github.com>
Co-authored-by: Shubham Parihar <shubhamparihar391@gmail.com>

src/client/actions/GuildBanAdd.js

@@ -0,0 +1,20 @@
+'use strict';
+
+const Action = require('./Action');
+const { Events } = require('../../util/Constants');
+
+class GuildBanAdd extends Action {
+  handle(data) {
+    const client = this.client;
+    const guild = client.guilds.cache.get(data.guild_id);
+
+    /**
+     * Emitted whenever a member is banned from a guild.
+     * @event Client#guildBanAdd
+     * @param {GuildBan} ban The ban that occurred
+     */
+    if (guild) client.emit(Events.GUILD_BAN_ADD, guild.bans.add(data));
+  }
+}
+
+module.exports = GuildBanAdd;