Plugwise

- Anna+Elga now always has `cooling_present` set to `True`: the Elga (always) has cooling-capability.
- Cooling-mode on/off is determined from specific Elga status-codes.

- Add a list of Plugwise devices to the API.

- New feature: for Adam, provide mode = off, related to the regulation_mode = off, and mode = cool, for regulation_mode = cooling.
Also, for Adam, return to providing a single setpoint for both heating and cooling.
- Update userdata, manual-fixture-creation, and tests related to the added modes.
- A few small Typing updates.
- Manually change the adam_jip fixture, for testing in pw-beta/Core plugwise.

- Remove last_used (schedule) from output.
- Bugfix for [Core Issue 102204](https://github.com/home-assistant/core/issues/102204)
- Add item-count to output.
- Support python 3.12

- Adam: remove use of control_state, xml-key no longer present.
- Fix error in manual fixture creation.