custom_card_esh_room | adding cover entity operation

[kor4ik]

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue: custom_card_esh_room | adding cover entity operation
• Link to documentation pull request:

Checklist

• [X ] The code change is tested and works locally.
• [X ] There is no commented out code in this PR.
• [ X] I have followed the contribution guidelines
  • [ X] This PR is for a custom-card or documentation change and therefore directed to the main branch.
  • This PR is for a official card or any other directly to the integration related change and therefore directed to the release branch.

[kor4ik]

Hi,
Is it possible to receive some guiding on how to pass Hassfest validation ?