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

* refactor(helpers): separate functions into files

* idk

* idk

src/helpers/roles/edit_role.ts

@@ -0,0 +1,25 @@
+import { RequestManager } from "../../rest/request_manager.ts";
+import { CreateRoleOptions } from "../../types/mod.ts";
+import { endpoints } from "../../util/constants.ts";
+import {
+  calculateBits,
+  requireBotGuildPermissions,
+} from "../../util/permissions.ts";
+
+/** Edit a guild role. Requires the MANAGE_ROLES permission. */
+export async function editRole(
+  guildID: string,
+  id: string,
+  options: CreateRoleOptions,
+) {
+  await requireBotGuildPermissions(guildID, ["MANAGE_ROLES"]);
+
+  const result = await RequestManager.patch(endpoints.GUILD_ROLE(guildID, id), {
+    ...options,
+    permissions: options.permissions
+      ? calculateBits(options.permissions)
+      : undefined,
+  });
+
+  return result;
+}