Add section for git-hook

[theodorosploumis]

git-hook example usage:

• Validate commit message
• Validate git author and email is valid (is a real human or a known machine user)
• Validate/lint code according to standards (PHP version, Drupal version etc)
• Validate git branch/tag name
• Static code analysis report
• Check ToDo comments
• Check debug code exists (should not)
• Check sensitive data (eg passwords) exist (should not)
• Lorem ipsum text (should not exist)
• Propose to reformat code
• Propose to fix code standards
• Run local tests
• Spell check
• Disallow wording
• Check file permissions
• Disallow direct push access to "protected" branches
• Display a helper message about current project
• Allow to ignore git-hook

PHP git-hook examples:

• https://github.com/captainhookphp/captainhook
• https://github.com/BrainMaestro/composer-git-hooks
• https://github.com/alexpott/d8githooks
• https://github.com/ramsey/conventional-commits

Documentation:

• https://git-scm.com/docs/githooks
• https://support.gitkraken.com/working-with-repositories/githooks
• https://githooks.com