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.
In general you could wire it to one of the SPIs (won't be superfast htough) it's available on the same Pins as QUADSPI memory so you lose this functionality... Or just get nucleo