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.
To be explicit, no I didn't have to move any files or fiddle anything. It was a bit non-intuitive to me to do that "import" thing as I'm more used to Visual Studio and the concept of just opening an existing project. But and Eclipse friend helped me figure stuff out.