Spanish updates (sky-map-team#446)

* Add code for Comet Leonard. (sky-map-team#439)

* Added a first cut at the comets layer just a clone of the meteors layer
to start with.

* Move all the celestial objects into their own file. Will need to do the
same for other languages.

* Added string resources for two comets.

* Remove a duplicitative method.

* Work in progress on the Comets Layer.

* Checkpointing this as an example of what not to do. Number in Kotlin
doesn't really support many number-like things...so this won't work.
There are good reasons for it, but it's still a pain.

* Added all the structure for the comets layer.

* Added in the data for Comet Leonard and also realized how clunky the
search code is.  Made it so we return no search results when an object
is invisible, but it's still unsatisfactory that it shows in the
autocomplete.

* Crappy comet image sky-map-team#1

* Slightly less crappy comet image.

* Spanish updates

* Spanish updates

* Spanish updates

* Spanish updates

Co-authored-by: John David Taylor <[email protected]>