Student controller documentation and updates

Feature Description

• Added comments and documentation to the student controller
• Changed logging and parameter group name of student controller from controller to ctrlStdnt to avoid conflicts
  • Fixed failing unit tests
• Consolidated the RATE_DO_EXECUTE check for the attitude controller. Now calculates desired yaw after the position controller update.

Impacted Areas

• Firmware
• Groud station (different logging/param group name)