Refactor bsblan coordinator (#124308)

* chore: Refactor BSBLanUpdateCoordinator to improve code readability and maintainability

* feat: Add BSBLan integration models

This commit adds the models for the BSB-Lan integration. It includes a dataclass for the BSBLanCoordinatorData, which stores the state and sensor information.

* refactor: Update BSBLANClimate class to use DataUpdateCoordinator without specifying the State type

* chore: Remove unused Sensor import in BSBLan models

* feat: Refactor BSBLanEntity to use CoordinatorEntity

The BSBLanEntity class has been refactored to inherit from the CoordinatorEntity class, which provides better integration with the update coordinator. This change improves code readability and maintainability.

* refactor: Remove unused config_entry variable in BSBLanUpdateCoordinator

* refactor: Update BSBLANClimate class to use DataUpdateCoordinator

Refactor the BSBLANClimate class to use the Coordinator of the entity

* refactor: Update tests to use the new structure

* fix coverage

 it should be the same as before

* refactor: moved dataclass BSBLanCoordinatorData

* use the data class inside init

* refactor: Remove unused config_entry variable in BSBLanUpdateCoordinator

* refactor: use BSBLanData from init

* remove entry data from diagnostics

* fix: add random interval back

* refactor: Simplify coordinator_data assignment in async_get_config_entry_diagnostics

* revert back to original except dataclass import

* revert: Add MAC address back to device info in BSBLanEntity