Frontend: Hook up attribute editing drawer

Save changes to attributes on the Category attribute configuration screen:

design: #547963[Security_configuration_-_group-level_-_security_labels_-_category_details_-_edit_label.png] 🎨

---

• add a Delete action to the ⋮ that triggers a modal which confirms whether the attribute should be deleted
• when confirmed, send the backend request to delete the attribute

---

- [ ] for saving a category and its attributes, if we go with the an autosaving draft + manual publish method, temporarily store the attribute details to be saved with the category? (decision issue)

---

• hook up to the backend to save the attribute details
• add a toast to confirm each action