Feature: Introduce Super Admins (#705)

* Feature: Introduce Super Admins

- added new devise model for super user
- added administrate gem
- sample dashboards for users and accounts

Co-authored-by: Pranav Raj Sreepuram <pranavrajs@gmail.com>

app/controllers/super_admin/application_controller.rb

@@ -0,0 +1,16 @@
+# All Administrate controllers inherit from this
+# `Administrate::ApplicationController`, making it the ideal place to put
+# authentication logic or other before_actions.
+#
+# If you want to add pagination or other controller-level concerns,
+# you're free to overwrite the RESTful controller actions.
+class SuperAdmin::ApplicationController < Administrate::ApplicationController
+  # authenticiation done via devise : SuperAdmin Model
+  before_action :authenticate_super_admin!
+
+  # Override this value to specify the number of elements to display at a time
+  # on index pages. Defaults to 20.
+  # def records_per_page
+  #   params[:per_page] || 20
+  # end
+end