refactor(helpers): separate functions into files (#667)

* refactor(helpers): separate functions into files

* idk

* idk

src/helpers/members/ban_member.ts

@@ -0,0 +1,19 @@
+import { RequestManager } from "../../rest/request_manager.ts";
+import { BanOptions } from "../../types/mod.ts";
+import { endpoints } from "../../util/constants.ts";
+import { requireBotGuildPermissions } from "../../util/permissions.ts";
+
+/** Ban a user from the guild and optionally delete previous messages sent by the user. Requires the BAN_MEMBERS permission. */
+export async function ban(guildID: string, id: string, options: BanOptions) {
+  await requireBotGuildPermissions(guildID, ["BAN_MEMBERS"]);
+
+  const result = await RequestManager.put(endpoints.GUILD_BAN(guildID, id), {
+    ...options,
+    delete_message_days: options.days,
+  });
+
+  return result;
+}
+
+// aliases
+export { ban as banMember };