Add cover device classes for window and awning actuator

[Tho85]

See #120

[oliverlinsenmaier]

@Tho85: Due to the latest problems with the update of the SysAP to firmware 3.3.1, I now gained the skills and time to test these changes. Since this pull request is 2 years old, I had to adapt your changes manually and it worked for me. Perfect!
@jheling: How can get this changes merged to main, so that all can profit from those?

[jheling]

@oliverlinsenmaier . There where two merge conflicts in this pull request that i tried to resolve. Can you compare my commit to your manual changes? If these are the same I will merge changes

[derjoerg]

Can this be morgend to the master-branch?