Enhancement proposal on retrogrades

[GitAttila]

This is an enhancement proposal for the retrograde feature.
Currently, the given API provides the information whether the Celestial Body at a given Origin is in retrograde or not (boolean). More elaborate approach would be to provide all stages of retrograde motions:

1. Pre-shadow phase
2. Retrograde station
3. Retrograde phase
4. Direct station
5. Post-retrograde phase

Why would be this useful? I can imagine how interesting it would be to build a Celestial bodies calendar with such particularly specific information on retrogrades for all celestial bodies.

At the following link, there is more on retrograde phases in detail:
https://www.astrologyhoroscopereadings.com/2021-mercury-retrograde-calendar.html

This actually could be a quick fix since the engine used under the hood (Moshier-Ephemeris-JS) already has this option.