New gemini.vim syntax plugin

[Byron Torres]

New Gemini Text syntax plugin for Vim, "~torresjrjr/gemini.vim".

Git repo URL: https://git.sr.ht/~torresjrjr/gemini.vim/
Project page: https://sr.ht/~torresjrjr/gemini.vim/

Aims to be correct. Since there's been a bit of inconsistency with
versioning, public documentation, specifications, other plugins, etc, I
wrote this plugin. It's existed for some time, but I never mentioned it.

Corrections are welcome. I Hope it helps.