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.
Sorry Joe, but the C standard specifies that the character set to use for program code is ANSI; you may use th echaracter set you want in comments and strings, but for program code, it has roughly to be ASCII
Bernard