Suggestion: exoplanet annotations
I came across this github project which was linked from the Astrophotography facebook group: https://github.com/nvermaas/exoplot
It plots known exoplanets on an image. It does a lot of stuff we wouldn't need to do as we already have plate solving etc., but it occurred to me that similar exoplanet annotations could be a good feature for Siril, especially with @FRed_Shift's developments in exoplanet light curve production. It could work similarly to the solsys command. exoplot keeps the exoplanets data in its own sqlite database but the exoplanet archive has an API that supports cone searches, so we could use online querying: https://exoplanetarchive.ipac.caltech.edu/docs/program_interfaces.html