plum-ecomax v0.3.12

⚠️ This release requires at least version 2023.7.0 of Home Assistant. Related to #38

• Reworked Get schedule and Set schedule service. Now both services use day and night states to better reflect schedule implementation on the controller itself.
• Many thermostat fixes. Resolves #33, #37. Huge thanks @Safs for the amazing work on testing.
• Fixed Get parameter service failing, when product UID is not available.