Rails 7.2 allow_browser version guard feature

Rails 7.2 and above introduce a feature that allows you to control which browsers can access your website. This is achieved by using the `allow_browser` method in your controllers. By default, the `allow_browser` method enforces a modern browser requirement, only allowing specific versions of Safari, Chrome, Firefox, Opera, and disallowing Internet Explorer. The modern browser versions are updated regularly and can be customized. You can specify minimum browser versions and whether they apply to all actions or specific ones. The `only` and `except` options allow you to selectively apply browser restrictions to specific controller actions. You can also override the default settings in individual controllers for more granular control. By removing or commenting out the `allow_browser` line, you can allow all browser versions to access your site. This feature helps ensure your website's compatibility with modern web standards and technologies.