core: frontend: vehicle-setup: allow tuning PID coefficients

- [Supported in QGC](https://docs.qgroundcontrol.com/master/en/qgc-user-guide/setup_view/tuning_ardusub.html)
- Would be nice to provide some guidance on how to actually go about adjusting the values to improve performance

Start in the core frontend vehicle-setup area and review the linked QGroundControl ArduSub tuning documentation. Identify which PID coefficients need to be exposed and what guidance is required for adjusting them. Done means the relevant coefficients can be tuned in the vehicle-setup interface with useful performance-adjustment guidance.

Written by the indexing model from the issue text.