Package: include SparkyBGC
GCS/SparkyBGC: add settings for MaxAngle

This is the angle where the gimbal locks.
GimbalControl: roll POI can track the FC roll

Adds a setting to select a fraction of the flight controller
roll to track for the gimbal controller. This will allow a
smoothed and reduced version of the flight roll.

The PoiMaximumRate rate will slow the slew rate down.
GCS/SparkyBGC: add settings for max rate and tracking fraction

Max Rate goes to StabilizationSettings.PoiMaximumRate and the
Tracking Fraction goes to BrushlessGimbalSettings.RollFraction.
SparkyBGC: update image