* Move exoplanet creation code to Lua
* Add more descriptions and handle missing values
* Remove old creation function and move load from CSV to Lua
* Properly document all functions, including a type for the `systemData` return value
* Add `\param` documentation to the scripts
* Cleanup and move helper functions to core scripts
* Throw Lua errors when things go wrong, instead of returning empty objects
This prevents the rest of the code from being run
* Flesh out TODO comments, so future us know why they are there
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Co-authored-by: Alexander Bock <alexander.bock@liu.se>
