This commit fixes the FreeRTOS CMock component in the following ways:
- Updated include directories to work with vanilla FreeRTOS v10.5.1
`#include "portmacro.h"` style inclusion.
* Added port layer from the FreeRTOS POSIX port, added
additional port code for ESP-IDF.
* Created another hello world example using that POSIX
port in tools/test_apps.
* Removed old linux app