Add Prettier and format files

[uncenter]

I was working on some other changes on the codebase and noticed the lack of a formatter. I personally Prettier incredibly useful but I understand if this isn't something you are interested in. I've tried to minimize the changes as much as possible by matching the rules to what you have already.

[uncenter]

It looks like HTML and CSS were formatted with two space indentation. Would you rather all files have the same indentation now or just keep it like it was before?

[elchininet]

Hi @uncenter,
Thanks for contributing. It is good to search first to see if something was already proposed related to that. I am OK with any new Eslint rules, but please, remove Prettier from this pull request, and do not format SVG or anything in the docs dist folder.
Regards

[uncenter]

Oops, didn't check. What do you have against Prettier specifically?

[elchininet]

Oops, didn't check. What do you have against Prettier specifically?

Basically that I don‘t like the things the it does to the style that I have written on purpose in some way. Just create Eslint rules specifically for the things that you want to address.

Regards