Add support for official AirTags

This pull requests adds support for official AirTags. To add AirTag you need to paste .plist file content in the integration setup process. This pull request requires changes in library from this PR: https://github.com/malmeloo/FindMy.py/pull/135 Also this PR updates integration for API changes from upcomming FindMy.py version Closes: https://github.com/malmeloo/hass-FindMy/issues/9