Add basic telemetry to Flight class, not dependent on reference frames. Related to #18 See https://github.com/krpc/krpc/blob/main/service/SpaceCenter/src/Services/Flight.cs - [ ] Flight.GForce - [ ] Flight.MeanAltitude - [ ] Flight.SurfaceAltitude - [ ] Flight.BedrockAltitude - [ ] Flight.Elevation - [ ] Flight.Latitude - [ ] Flight.Longitude - [ ] Flight.AtmosphereDensity