Feature/add linter to tailwind

Objective:

Add linter and prettier for tailwind.

What has been done:

• added eslint-plugin-tailwindcss and prettier-plugin-tailwindcss
• added 3 new scripts to package.json:

    "prettier:ci": "./node_modules/.bin/prettier --check .",
    "format": "next lint && ./node_modules/.bin/prettier --check .",
    "format:fix": "next lint --fix && ./node_modules/.bin/prettier --write ."

• set tailwindcss/enforces-shorthand and tailwindcss/classnames-order
• formatted code

Additionally:

• added cypress.config.ts to .eslintignore
• deleted 'color-hex-case': 'upper' from prettier.config.js because it is useless
• added prettier:ci to CI
• deleted @types/images.d.ts