VSCode [VSCodium] Spell Checker 🙏

This is a _continuous_ source of frustration for me. 😢
Most recently: https://github.com/dwyl/technical-glossary/pull/43#pullrequestreview-1011019173
This is such a time-suck I _wish_ there was a _permanent_ solution to it.

(_obvs I wish I could just **immediately** overcome my [**dyslexia**](https://github.com/nelsonic/nelsonic.github.io/issues/664) and spell all words perfectly every time...
if there was a magic cure, I'm sure lots of people would pay good money for it ..._)

# Todo

+ [x] Find (or ***`make`***!!) a VSCode [useable in VSCodium] plugin that does spell-checking.

If I am forced to write a spell-checker from scratch, I will do it,
And document it better than anyone else and make it re-usable in our App.
So that _nobody_ has to suffer this time-suck!