Scripts for initial flashing of STM32 on v0.4

[martukas]

What has to be done
The controller.sh script should have a command for initial flashing of STlink to the STM32 processor on the v0.4 boards.

Subtasks:

• Add script for what can be done in Linux
• Save copies of additional files on Google drive, for steps that must be done in Windows
• Update documentation in repo
• Add additional tools needed to BOMs

How do you know it has to be done
Will need to be setting these up

Starting points
There is a Google doc explaining how to do this in Windows.