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.
How did you try to attach the screeshot? Did you try using the "Attach file" feature, just below the post editor (just above the "Post", "Preview", "Cancel" buttons?)