feat(categories): add create, update, and delete methods to category service

- Introduced `create`, `update`, and `remove` methods for managing categories via the service.
- Enables API integration for category CRUD functionality.

frontend/src/services/category.service.ts

@@ -11,4 +11,18 @@ export const CategoryService = {
 		const { data } = await api.get<Category>(`/categories/${id}`);
 		return data;
 	},
+
+	async create(category: Partial<Category>): Promise<Category> {
+		const { data } = await api.post<Category>("/categories", category);
+		return data;
+	},
+
+	async update(id: string, category: Partial<Category>): Promise<Category> {
+		const { data } = await api.patch<Category>(`/categories/${id}`, category);
+		return data;
+	},
+
+	async remove(id: string): Promise<void> {
+		await api.delete(`/categories/${id}`);
+	},
 };