Add Deako integration (#121132)

* Deako integration using pydeako

* fix: address feedback

- make unit tests more e2e
- use runtime_data to store connection

* fix: address feedback part 2

- added better type safety for Deako config entries
- refactored the config flow tests to use a conftest mock instead of directly patching
- removed pytest.mark.asyncio test decorators

* fix: address feedback pt 3

- simplify config entry type
- add test for single_instance_allowed
- remove light.py get_state(), only used once, no need to be separate function

* fix: ruff format

* Update homeassistant/components/deako/__init__.py

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

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Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

CODEOWNERS

@@ -294,6 +294,8 @@ build.json @home-assistant/supervisor
 /tests/components/date/ @home-assistant/core
 /homeassistant/components/datetime/ @home-assistant/core
 /tests/components/datetime/ @home-assistant/core
+/homeassistant/components/deako/ @sebirdman @balake @deakolights
+/tests/components/deako/ @sebirdman @balake @deakolights
 /homeassistant/components/debugpy/ @frenck
 /tests/components/debugpy/ @frenck
 /homeassistant/components/deconz/ @Kane610