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>

---------

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

mypy.ini

@@ -1145,6 +1145,16 @@ disallow_untyped_defs = true
 warn_return_any = true
 warn_unreachable = true
 
+[mypy-homeassistant.components.deako.*]
+check_untyped_defs = true
+disallow_incomplete_defs = true
+disallow_subclassing_any = true
+disallow_untyped_calls = true
+disallow_untyped_decorators = true
+disallow_untyped_defs = true
+warn_return_any = true
+warn_unreachable = true
+
 [mypy-homeassistant.components.deconz.*]
 check_untyped_defs = true
 disallow_incomplete_defs = true