Added ZHA IKEA shortcut button E1812

Basing on Styrbar definition. Used Developer Tools -> Events to listen to 'zha_event' events.

Blueprint Checklist

[x] You viewed the README and conformed to the naming conventions
[x] You ordered the actions as stated in the README action order
[x] All filenames are lowercase and uses '-' for spaces and not '_' while using {service-name}-{switch-name-or-type}.yaml format
[x] Images are png
[x] Image backgrounds are transparent and is cropped to the device boundries
[x] Images has a maximum width of 800px and maximum height of 500px
[x] There are no missing buttons or actions
[x] Your integration/service is running on the latest version
[x] You have tested your blueprints and made sure each button and action works