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.
Sound like you need to figure out printf (see "printf through uart" thread first off)
Other than that you dont need printf to print characters to the uart of course..