pgm_textfile_generator need own standard build chain

Description:
The pgm_textfile_generator is currently designed to run on the MCU, which is not ideal for the development process. It should be refactored to run on a desktop environment as a preparatory step for coding the actual software. This would involve creating a separate build target using standard GCC, and isolating it from MCU-related targets. It could also be enhanced with a main function to make it executable.

User Story:
As a developer, I expect the pgm_textfile_generator to run on a desktop environment with its own build target, so that I can efficiently prepare for coding the actual software.