Plugwise

- Bugfix for 768 via plugwise [v1.5.2](https://github.com/plugwise/python-plugwise/releases/tag/v1.5.2).

- Link to plugwise [v1.5.1](https://github.com/plugwise/python-plugwise/releases/tag/v1.5.1) and adapt:
- Change thermostat device-key `mode` to `climate_mode`

- Fix typing error
- Downstream Core PR 126896
- Optimize test code, improve docstrings and add comments

- Link to plugwise [v1.5.0](https://github.com/plugwise/python-plugwise/releases/tag/v1.5.0) and adapt:
- Remove the connection-timeout function added in v0.53.3, not accepted in Core
- Remove the need to pass a connection-timeout value to the backend library, as suggested by a Core dev
- Link to plugwise [v1.4.4](https://github.com/plugwise/python-plugwise/releases/tag/v1.4.4) and adapt
- Fix coordinator connection-method: don't use defaults

- Link to plugwise [v1.4.3](https://github.com/plugwise/python-plugwise/releases/tag/v1.4.3).

- Link to plugwise [v1.4.2](https://github.com/plugwise/python-plugwise/releases/tag/v1.4.2) solving #739.
- Improve / clean up config_flow code (736 and 747).
- Typing and other fixes (738).