Add linting to project

[jdenoc]

As part of the CI/CD process (GitHub Actions) I should have some linting processes run.

• [x] PHP
• [x] CSS
• [x] JavaScript
  • [x] VueJS
• ~[ ] RenovateBot config~

Resources:

• https://laravel-news.com/laravel-pint
  • https://github.com/laravel/pint/blob/v1.2.0/resources/presets/laravel.php
• https://eslint.org/docs/latest/user-guide/getting-started
• https://github.com/aquaproj/aqua/blob/v0.7.2/.github/workflows/renovate-config-validator.yaml