Added Rails 6 new features.

Rails 6 Feature

Action Text:-
How To Implement:-
  If you want to add action_text into User model.
Step:-
1.   rails action_text:install
2.   add “has_rich_text :text” string into user.rb
3.   <%= form.rich_text_area :content %>

RealTimeUser:-
  Wikipedia use this text feature, for write/store information.

Work/Feature:- 
  User can write a large size of text with adding extra features into the text, like
* add link
* add image
* change word/sentence size/colour
* add points.

Multi DB:- 

Action Mailer:-