Add yarn script commands for Drupal coding standard and Drupal Practice for Vartheme BS4 and VARTHEME_BS4_SUBTHEME

Problem/Motivation

Saving time on checking standards and practice before committing any code.

#3113196: Drupal 9 Readiness for [Vartheme BS4 (Bootstrap 4 - SASS)] with Drupal coding standard and practice

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Drupal coding standard and Drupal Practice check should pass

PHPCS, PHPCBF for both --standard=Drupal and --standard=DrupalPractice

Check Vartheme BS4 (Bootstrap 4 - SASS) Drupal coding standard

phpcbf --standard=Drupal --extensions=php,inc,install,test,profile,theme,scss,css,info,txt,md,yml /var/www/html/products/vartheme_bs4/ --ignore="/var/www/html/products/vartheme_bs4/node_modules/ , /var/www/html/products/vartheme_bs4/VARTHEME_BS4_SUBTHEME/node_modules/"

phpcs --standard=Drupal --extensions=php,inc,install,test,profile,theme,scss,css,info,txt,md,yml /var/www/html/products/vartheme_bs4/ --ignore="/var/www/html/products/vartheme_bs4/node_modules/ , /var/www/html/products/vartheme_bs4/VARTHEME_BS4_SUBTHEME/node_modules/"

Check Vartheme BS4 (Bootstrap 4 - SASS) Drupal Practice

phpcbf --standard=DrupalPractice --extensions=php,inc,install,test,profile,theme,scss,css,info,txt,md,yml /var/www/html/products/vartheme_bs4/ --ignore="/var/www/html/products/vartheme_bs4/node_modules/ , /var/www/html/products/vartheme_bs4/VARTHEME_BS4_SUBTHEME/node_modules/"

phpcs --standard=DrupalPractice --extensions=php,inc,install,test,profile,theme,scss,css,info,txt,md,yml /var/www/html/products/vartheme_bs4/ --ignore="/var/www/html/products/vartheme_bs4/node_modules/ , /var/www/html/products/vartheme_bs4/VARTHEME_BS4_SUBTHEME/node_modules/"

Proposed resolution

In Vartheme BS4 base theme
Having the following yarn script commands

yarn eslint
yarn stylelint
yarn phpcs
yarn phpcbf

as in the list of yarn scripts

  "scripts": {
    "theme:init": "gulp",
    "theme:build": "gulp compile",
    "theme:watch": "gulp watch",
    "theme:create-sub-theme": "bash ./scripts/create-new-vartheme-bs4.sh",
    "eslint": "node ./node_modules/eslint/bin/eslint.js --config=.eslintrc.json .",
    "stylelint": "npx stylelint --config=.stylelintrc.json .",
    "prettier": "prettier --write \"./js/**/*.es6.js\"",
    "phpcs": "phpcs --standard=./.phpcs.xml .",
    "phpcbf": "phpcbf --standard=./.phpcs.xml ."
  },

And for VARTHEM_BS4_SUBTHEME too to work in dev of Vartheme BS4 or in outer projects.

In VARTHEM_BS4_SUBTHEME
Have the following yarn script commands

yarn eslint
yarn stylelint
yarn phpcs
yarn phpcbf

as in the list of yarn scripts

  "scripts": {
    "theme:init": "gulp",
    "theme:build": "gulp compile",
    "theme:watch": "gulp watch",
    "eslint": "node ./node_modules/eslint/bin/eslint.js --config=.eslintrc.json .",
    "stylelint": "npx stylelint --config=.stylelintrc.json .",
    "prettier": "prettier --write \"./js/**/*.es6.js\"",
    "phpcs": "phpcs --standard=./.phpcs.xml .",
    "phpcbf": "phpcbf --standard=./.phpcs.xml ."
  },