Development tools for Zephyr on STM32Workbench for Zephyr: VS Code extension to set up, build, flash and debug Zephyr applications on STM32.Devicetree manager: browse, edit and visualize Zephyr devicetree, STM32CubeMX-like for Zephyr.
Thanks Bernard for your answer. It is very helpful.
I cannot know if it works yet because I think I first have to fix my external library issue. I'll post another question in the forum about it.