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

* refactor(helpers): separate functions into files

* idk

* idk

src/helpers/templates/delete_guild_template.ts

@@ -0,0 +1,22 @@
+import { RequestManager } from "../../rest/request_manager.ts";
+import { structures } from "../../structures/mod.ts";
+import { GuildTemplate } from "../../types/mod.ts";
+import { endpoints } from "../../util/constants.ts";
+import { requireBotGuildPermissions } from "../../util/permissions.ts";
+
+/**
+ * Deletes a template from a guild.
+ * Requires the `MANAGE_GUILD` permission.
+ */
+export async function deleteGuildTemplate(
+  guildID: string,
+  templateCode: string,
+) {
+  await requireBotGuildPermissions(guildID, ["MANAGE_GUILD"]);
+
+  const deletedTemplate = (await RequestManager.delete(
+    `${endpoints.GUILD_TEMPLATES(guildID)}/${templateCode}`,
+  )) as GuildTemplate;
+
+  return structures.createTemplateStruct(deletedTemplate);
+}