Lacking Documentation on GX_STATUS-Related Macros

[Triggs02]

While getting up to speed on the GUIX API, I noticed that there was no documentation that described the purposes of any GX_STATUS-related macro that is defined in gx_api.h. The GUIX API exposes 4 functions that allow users to interact with a GX_WIDGET's gx_widget_status field: gx_widget_status_add, gx_widget_status_get, gx_widget_status_remove, and gx_widget_status_test. Without documentation for the different statuses defined in gx_api.h, I am unable to effectively use these 4 API functions.

I am requesting that the eclipse-threadx team add the relevant descriptions for these statuses to the guix documentation in this repository.