[Meta] Fix coding standards in core

Problem/Motivation

This is just to make it easier to find the issue for fixing coding standards. It is a list of the components and the tool being used for checking standards and the meta issues for fixing the standards.

CSS - (Stylelint) #1995272: [Meta] Refactor module CSS files inline with our CSS standards → . Also, mherchel has started a review of the CSS standards at https://docs.google.com/document/d/1rihTDDGy9-m0TGIadgz16TQ1aONc0OC3u2Tk...

JavaScript - (ESLint) #2912962: Step 1 JS codestyle: [meta] Fix JS coding standards in core →

PHP - (PHP_CodeSniffer) 🌱 [meta] Fix PHP coding standards in core Active

Spelling - (cspell) 📌 [Meta] Remove spelling errors from dictionary.txt and fix them Active

Twig - No meta yet. There is an issue to add 📌 Adopt friendsoftwig/twigcs for Twig coding standards Needs review .

YAML -