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.
Actually most of the STM32CubeMx examples already have a project (i.e. .cproject ) and you just import them into the workspace, just be aware that they use links (for the location of the c files) for most of the source code.