feat: redesign library api

[EuleMitKeule]

This PR introduces the following changes:

• Add Type hints for all functions and parameters
• Unify BleakConnection and Thermostat
• Remove homeassistant dependency from eq3btsmart
• Simplify API for Thermostat
• Add bluetooth device logic to integration
• Improve handling of connection issues in integration and library
• Prevent disconnects by using a smaller scan interval
• Add dataclass models for configuration
• Add structs for device commands
• Add connection monitor for reconnect logic
• Refactor structs to typed dataclasses
• Remove logs from library for now
• Use builtin type subclasses for data parsing logic

[dbuezas]

Holy... You really want to be on each line of git blame 😆
Looking forward to see the finished code

[EuleMitKeule]

Yeah, I might have went a bit overboard on some of the refactorings, but I felt some changes were necessary to improve overall quality and readability of the code. Also some minor features that were previously present are missing right now and not everything is 100% working and tested, so this will take a bit more work.
I have already tested it in Home Assistant and at least with Adapter set to AUTO and using my bluetooth proxy it seems to still behave as expected.

[dbuezas]

Cool, I also get the same feeling with other's people code. But python isn't the language I use the moat, so I may have diverged from the python ways