Zephyr Workbench, a VSCode extension to manage Zephyr on STM32.
It enables users to easily create, develop, and debug Zephyr applications.
Main features:
Install host dependencies.
Import toolchain and SDK.
Create, configure, build and manage apps.
Debug STM32.
You can directly download it from the VSCode marketplace
For more details, visit the Zephyr Workbench
The STM32 mcu has an internal pull-up on reset pin, so you just need to connect pin 15 of STLink (on the 20 pin connector) to the Reset input of mcu. Nothing else.
And remove your hard wired reset connection to VCC.