docs: add some important shield features to README.md

Author: datamweb

README.md

@@ -29,6 +29,23 @@ These are much like the access codes that GitHub uses, where they are unique to
 can have more than one. This can be used for API authentication of third-party users, and even for allowing
 access for a mobile application that you build.
 
+## Some Important Features
+
+1. Session-based authentication (traditional email/password with remember me)
+2. Stateless authentication using Personal Access Tokens
+3. Optional Email verification on account registration
+4. Optional Email-based Two Factor Authentication after login
+5. Magic Login Links when a user forgets their password
+6. Flexible groups-based access control (think roles, but more flexible)
+7. Users can be granted additional permissions
+8. User Entity and UserModel ready for you to use or extend
+9. A simple helper that provides access to the most common auth actions
+10. Easily extendable controllers
+11. All required views that can be used as is or swapped out for your own
+12. Highly configurable
+13. Built to extend and modify
+14. Save initial settings in your code so it can be in version control, but can also be updated in the database, thanks to our [Settings library](https://github.com/codeigniter4/settings)
+
 ## Getting Started
 
 ### Prerequisites