fix: Convert Bosch BTH-RA to modernExtend (#7498)

* Convert to `modernExtend`

* Remove cool` from `system_mode`

* Set `ea.STATE` for local temperature

* Add `ea.STATE` to system mode

* Add `tz.thermostat_system_mode`

* Fix r/w access

* Update r/w permissions

* Update bosch.ts

* Update bosch.ts

* Update bosch.ts

* Update bosch.ts

* Update bosch.ts

* Update bosch.ts

* Update bosch.ts

* Remove unused variables

* Add `adaptationStatus` definition

* Fix for Lint

* Use `modernExtend` for custom converter

* Import `ModernExtend` type

* Move `climate` expose to `ModernExtend`

* Remove `running_state` from `convertSet`

* Lint fix

* Remove unused converters

* Convert `ignoreDst` to `modernExtend`

* Minor fixes for all Bosch thermostats

* Move `adaptationStatus` into `valveAdaptProcess`

* Add `tz.thermostat_local_temperature`

* Set access level for `withSystemMode`

* Fix configuration error

* Add `tz.thermostat_local_temperature` once more

Should fix `No converter available for 'local_temperature' (0)` error