A GitHub action to apply PHPCS/PHPCBF fixes

[WorkOfStan]

• This GitHub Action automates PHPCS formatting across your project, ensuring consistent code styling by creating a new branch for review when necessary. It simplifies integrating PHPCS/PHPCBF into your workflow.
• A warning appears in the GitHub Actions Annotations section if changes occur and therefore a new branch is created.
• A proposed manual changed linked from the warning in the GitHub Actions Annotations section.
• The input parameter commit-changes: true to commit to the current branch.
• Customizable Commit Message: Introduced an input commit-message to allow users to specify a custom commit message.
• Branch Name Output: The branch-name is provided as an output for downstream workflows.
• Notice about a successful commit.
• Checkout code: Fetches the latest changes so that modifications from a previous job are included, enabling seamless job chaining.