Basic vessel control

[djungelorm]

Add RPCs for basic controlling of a vessel.

See https://github.com/krpc/krpc/blob/main/service/SpaceCenter/src/Services/Control.cs

• Control constructor (created by Vessel.Control property)
• Control.Pitchv
• Control.Roll (instantaneous and trim)
• Control.Yaw (instantaneous and trim)
• Control.SAS
• Control.SASMode
• Control.SpeedMode
• Control.RCS
• Control.Gear
• Control.Brakes
• Control.Lights
• Control.WheelThrottle (instantaneous and trim)
• Control.WheelSteer (instantaneous and trim)
• Control.Throttle
• Control.ActivateNextStage

[djungelorm]

Roll/pitch/yaw controls (and trim versions) are added by #30. Note that the behavior of these RPCs are different to their kRPC1 counterparts - see the documentation comments for details.