feat(i18n): Spanish localization (phase 4)

Complete implementation of Spanish (es-419) language support:
- Canonical catalogs and data: messages/es.json, data/es/**, lib/data/es/**, public/exemplos/es/**
- Canonical slugs: /es/series, /es/catalogo, /es/comparacion, /es/componentes, /es/diagnostico, /es/frameworks, /es/glosario, /es/selector, /es/acerca
- Dedicated search index at /api/busca/es with Spanish accent normalization
- Strict exclusion of book references in Spanish routes and catalogs
- Language selector and root negotiation with es active (ENABLED_LOCALES = ['pt', 'en', 'es'])
- Extended verification suite: check-i18n, smoke-imagem and verifica-vazamentos

Co-Authored-By: Antigravity <noreply@google.com>

public/exemplos/es/esp-idf.c

@@ -0,0 +1,56 @@
+/*
+ * Ejemplo ESP-IDF v5.x+ para ESP32
+ * Demostración de inicialización del sistema, gestión de tareas FreeRTOS y log unificado
+ * 
+ * Gestión de componentes (main/idf_component.yml):
+ *   dependencies:
+ *     espressif/led_strip: "^2.5.0"
+ */
+
+#include <stdio.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "driver/gpio.h"
+#include "esp_log.h"
+#include "esp_system.h"
+#include "esp_chip_info.h"
+
+static const char *TAG = "main_app";
+
+#define BLINK_GPIO  GPIO_NUM_2  // Ajuste según el pin del LED de su placa
+
+static void blink_task(void *pvParameters)
+{
+    // Configura el pin GPIO con la nueva API de ESP-IDF
+    gpio_reset_pin(BLINK_GPIO);
+    gpio_set_direction(BLINK_GPIO, GPIO_MODE_OUTPUT);
+
+    bool led_state = false;
+
+    while (1) {
+        led_state = !led_state;
+        gpio_set_level(BLINK_GPIO, led_state);
+        
+        ESP_LOGI(TAG, "LED %s | Heap libre: %lu bytes", 
+                 led_state ? "ENCENDIDO" : "DESENCENDIDO", 
+                 (unsigned long)esp_get_free_heap_size());
+                 
+        vTaskDelay(pdMS_TO_TICKS(1000));
+    }
+}
+
+void app_main(void)
+{
+    // Informações do chip SoC
+    esp_chip_info_t chip_info;
+    esp_chip_info(&chip_info);
+
+    ESP_LOGI(TAG, "===========================================");
+    ESP_LOGI(TAG, "  Iniciando ESP-IDF v5.x Modern Application ");
+    ESP_LOGI(TAG, "  Modelo do Chip: %d | Núcleos: %d | Rev: %d", 
+             chip_info.model, chip_info.cores, chip_info.revision);
+    ESP_LOGI(TAG, "===========================================");
+
+    // Cria uma tarefa FreeRTOS dedicada
+    xTaskCreate(blink_task, "blink_task", 3072, NULL, 5, NULL);
+}