Basic flight telemetry (independent of reference frames)

[djungelorm]

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