feat(freertos): Add application task tag support

This commit enables support for application task tag.

- Added CONFIG_FREERTOS_USE_APPLICATION_TASK_TAG option
- Added basic unit test

components/freertos/test_apps/freertos/kernel/tasks/test_app_task_tag.c

@@ -0,0 +1,35 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "sdkconfig.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "unity.h"
+#include "test_utils.h"
+
+#if CONFIG_FREERTOS_USE_APPLICATION_TASK_TAG
+
+static BaseType_t tag_cb(void *arg)
+{
+    BaseType_t *tag_cb_called = (BaseType_t *)arg;
+    *tag_cb_called = pdTRUE;
+    return pdTRUE;
+}
+
+TEST_CASE("Test application task tag", "[freertos]")
+{
+    BaseType_t tag_cb_called = pdFALSE;
+
+    // Set the app task tag for current task
+    vTaskSetApplicationTaskTag(NULL, tag_cb);
+    // Check app task tag is correct
+    TEST_ASSERT_EQUAL(tag_cb, xTaskGetApplicationTaskTag(NULL));
+    // Test the app task tag by calling it
+    TEST_ASSERT_EQUAL(pdTRUE, xTaskCallApplicationTaskHook(NULL, (void *)&tag_cb_called));
+    TEST_ASSERT_EQUAL(pdTRUE, tag_cb_called);
+}
+
+#endif // CONFIG_FREERTOS_USE_APPLICATION_TASK_TAG

components/freertos/test_apps/freertos/sdkconfig.ci.freertos_options

@@ -21,3 +21,4 @@ CONFIG_FREERTOS_USE_LIST_DATA_INTEGRITY_CHECK_BYTES=y
 CONFIG_FREERTOS_TIMER_TASK_AFFINITY_CPU1=y
 CONFIG_FREERTOS_USE_TICK_HOOK=y
 CONFIG_FREERTOS_USE_IDLE_HOOK=y
+CONFIG_FREERTOS_USE_APPLICATION_TASK_TAG=y