Add description for vTaskList

Describe each column which vTaskList print:
task name, task status, task priority, task stack unused watermark lewel, task number

Author: Carmichael561

include/task.h

@@ -1795,8 +1795,10 @@ UBaseType_t uxTaskGetSystemState( TaskStatus_t * const pxTaskStatusArray,
  * demo applications.  Do not consider it to be part of the scheduler.
  *
  * vTaskList() calls uxTaskGetSystemState(), then formats part of the
- * uxTaskGetSystemState() output into a human readable table that displays task
- * names, states and stack usage.
+ * uxTaskGetSystemState() output into a human readable table that displays task:
+ * names, states, priority, stack usage and task number.
+ * Stack usage specified as the number of unused StackType_t words stack can hold
+ * on top of stack - not the number of bytes.
  *
  * vTaskList() has a dependency on the sprintf() C library function that might
  * bloat the code size, use a lot of stack, and provide different results on

tasks.c

@@ -4434,7 +4434,9 @@ static void prvResetNextTaskUnblockTime( void )
          *
          * vTaskList() calls uxTaskGetSystemState(), then formats part of the
          * uxTaskGetSystemState() output into a human readable table that
-         * displays task names, states and stack usage.
+         * displays task: names, states, priority, stack usage and task number.
+         * Stack usage specified as the number of unused StackType_t words stack can hold
+         * on top of stack - not the number of bytes.
          *
          * vTaskList() has a dependency on the sprintf() C library function that
          * might bloat the code size, use a lot of stack, and provide different