Releases for Critical CSS

New development release branch according with naming conventions.

• Fixes https://www.drupal.org/project/critical_css/issues/3122150
• Fixes https://www.drupal.org/project/critical_css/issues/3175127
• Disables this module for admin routes

Make critical_css service explicitly public

Major rewrite with no breaking changes:

• Updates loadCSS library to v2 and includes it directly in the module: https://www.drupal.org/project/critical_css/issues/3033266
• Adds hook to allow other modules to alter the file paths suggestion: https://www.drupal.org/project/critical_css/issues/3034064

• Fixes escaping of inline css
• Adds a new fallback file (default-critical.css) which is used if none other filename matches
• Documentation fixes

Bug fixes with configuration form

Fixes typos and Drupal Coding standards

Fix Drupal coding standards