fix: move the moon behind show_moon option (…

[stevenp2]

…#2072)

Description

• Addressed the issue in fix: the moon is not a planet #2072 and moved the moon behind show_moon option
• Also added documentation alongside it

Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• This change requires a documentation update

How Has This Been Tested?

Manual testing by setting show_moon and show_pluto to be true.

Configuration:

• Neovim version (nvim --version): NVIM v0.7.0
• Operating system and version: macOS 12.2.1

Checklist:

• My code follows the style guidelines of this project (stylua)
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (lua annotations)

[Conni2461]

thanks :)