Hello @NP
To create controllers and view in krayin you can go through the below links.
For Controllers - https://devdocs.krayincrm.com/1.x/packages/controllers.html
For Views -
https://devdocs.krayincrm.com/1.x/packages/views.html
For creating a New Database Table
https://devdocs.krayincrm.com/1.x/packages/create-migrations.html
Thanks & Regards