feat: Implement reference data management for states, transport modes, transport types, and valuation methods

- Added server-side loading logic for states, transport modes, transport types, and valuation methods with pagination support.
- Created Svelte components for displaying and managing states, transport modes, transport types, and valuation methods.
- Implemented infinite scroll functionality for loading more data as the user scrolls.
- Added error handling and user feedback for API interactions.
- Included dialogs for creating and editing entries in each reference data category.

frontend/src/lib/api/dashboard/refrence_data/sectors.ts

@@ -0,0 +1,72 @@
+/**
+ * API Client para Sectors
+ * Gestiona las operaciones CRUD para los sectores
+ */
+import { api } from '$lib/api';
+
+export interface Sector {
+	key: string;
+	description: string;
+	authorized: number;
+}
+
+export interface SectorListResponse {
+	items: Sector[];
+	total: number;
+	page: number;
+	page_size: number;
+}
+
+export interface CreateSectorData {
+	key: string;
+	description: string;
+	authorized: number;
+}
+
+export interface UpdateSectorData {
+	key?: string;
+	description?: string;
+	authorized?: number;
+}
+
+/**
+ * API para Sectors
+ */
+export const sectorsApi = {
+	/**
+	 * Lista todos los sectores con paginación
+	 * @param page - Número de página (por defecto 1)
+	 * @param pageSize - Tamaño de página (por defecto 50)
+	 */
+	list: (page = 1, pageSize = 50) =>
+		api.get<SectorListResponse>(
+			`/v1/sectors?page=${page}&page_size=${pageSize}`
+		),
+
+	/**
+	 * Obtiene un sector por key
+	 * @param key - Clave del sector
+	 */
+	get: (key: string) => api.get<Sector>(`/v1/sectors/${key}`),
+
+	/**
+	 * Crea un nuevo sector
+	 * @param data - Datos del sector a crear
+	 */
+	create: (data: CreateSectorData) =>
+		api.post<Sector>('/v1/sectors', data),
+
+	/**
+	 * Actualiza un sector existente
+	 * @param key - Clave del sector a actualizar
+	 * @param data - Datos a actualizar
+	 */
+	update: (key: string, data: UpdateSectorData) =>
+		api.put<Sector>(`/v1/sectors/${key}`, data),
+
+	/**
+	 * Elimina un sector
+	 * @param key - Clave del sector a eliminar
+	 */
+	delete: (key: string) => api.delete(`/v1/sectors/${key}`)
+};