* Add module support & modularize existing query

This creates a base to expose more features on the supported devices.
At the moment, the most visible change is that each update cycle gets information from all available modules:
* Basic system info
* Cloud (new)
* Countdown (new)
* Antitheft (new)
* Schedule (new)
* Time (existing, implements the time/timezone handling)
* Emeter (existing, partially separated from smartdevice)

* Fix imports

* Fix linting

* Use device host instead of alias in module repr

* Add property to list available modules, print them in cli state report

* usage: fix the get_realtime query

* separate usage from schedule to avoid multi-inheritance

* Fix module querying

* Add is_supported property to modules

* Consolidate API for both emeter&usage modules
* Add new cli command 'usage' to query usage

* Do not request unsupported modules after the initial update

* debugify logging

* Fix test_deprecated_type stalling

* Fix strips with modularize

* Fix test_deprecated_type stalling (#325)

* Add a note about socket sharing

* Show inherited members for apidocs

* Remove outdated note of emeters not being supported on smartstrips

* Describe emeter and usage modules, add note about NTP for time sync

* Describe lib design and modules

* Bump sphinx version, ignore d001 (line-length) for doc8

* demote energy & usage to 3rd level, promote api for 2nd

* Drop deprecated, type-specific options in favor of --type

* Fix tests

* Add fixtures for kl420

* readme

* Avoid retrying open_connection on unrecoverable errors

- We can retry so hard that we block the event loop

Fixes
```
2022-04-16 22:18:51 WARNING (MainThread) [asyncio] Executing <Task finished name=Task-3576 coro=<open_connection() done, defined at /opt/homebrew/Cellar/python@3.9/3.9.12/Frameworks/Python.framework/Versions/3.9/lib/python3.9/asyncio/streams.py:25> exception=ConnectionRefusedError(61, "Connect call failed (192.168.107.200, 9999)") created at /opt/homebrew/Cellar/python@3.9/3.9.12/Frameworks/Python.framework/Versions/3.9/lib/python3.9/asyncio/tasks.py:460> took 1.001 seconds
```

* comment

* Prepare 0.5.0

* Add note about how to include release summary to changelog