Add body measurements tracking

Please add the ability to record and track body measurements in the app, such as waist, hips, neck, chest, arms, thighs, and other body measurements.

This would be especially useful during weight loss, when users may want to track body measurement trends in addition to weight.

If Sonar could store and show these measurements and trends, it would reduce the need to use separate body measurement tracking apps, since all health and body progress data could be tracked in one place.