Add Prettier and Lint-staged config

[simison]

I started playing with some code and I had trouble with my editor integrations. 😅

You might have Prettier directly in the editor as dependency or installed globally?

I've:

• Added Prettier as an explicit dependency
• Added Lint-staged which runs Eslint and Prettier on commit

Now when I modify files, they get reformatted as I save them and for others without editor integrations as they commit them.

Removed semi: 'never' rule from Eslint config — I don't have preference over the way or the other but it was causing trouble by conflicting between Eslint and Prettier.

First Eslint said "never" is not valid (needs to be "off", "warn", "error"). Then I switched it to error and it became a conflict between Eslint and Prettier:

It was a battle of two mighty ones so I just figured let them find peace and harmony and remove all rules. 😅

This will add tons of noise next time you commit anything since it'll reformat files by Prettier and by this rule-removal.

Happy to just npx prettier . --write it all right next up and move on. 😁

Thoughts?