Using ESP-NN in Zephyr project (or build with another build system) (TFMIC-11)

[Yaxit]

Hi,
I'm working on a benchmarking project within a Zephyr RTOS application on the Stamp_3c board (ESP32-C3).
I previously succeded in setting up the project with CMSIS_NN acceleration on another platform, and I would like to do something similar with the new board.

I'm a bit confused about how I can build TFLite with ESP_NN kernels and use these in a Zephyr project.
I first thought that I could add the project as a subdirectory from my CMakeLists file, but of course, this does not work, as the build system of Zephyr has no notion of ESP-IDF. I must admit I'm not very practical of build systems in general, which does not help.

Any idea on how I could achieve this?