Add support for HomeKit (#12488)

* Basic Homekit support

* Added Temperatur Sensor
* Added Window Cover

* Code refactored

* Added class HomeAccessory(Accessory)
* Added class HomeBridge(Bridge)
* Changed homekit imports to relative, to enable use in custom_components
* Updated requirements
* Added docs
* Other smaller changes

* Changed Homekit from entity to class

* Changes based on feedback
* Updated config schema
* Add only covers that support set_cover_position

* Addressed comments, updated to pyhap==1.1.5

* For lint: added files to gen_requirements_all
* Added codeowner

* Small change to Wrapper classes

* Moved imports to import_types, small changes

* Small changes, added tests

* Homekit class: removed add_accessory since it's already covered by pyhap
* Added test requirement: HAP-python
* Added test suit for homekit setup and interaction between HA and pyhap
* Added test suit for get_accessories function

* Test bugfix

* Added validate pincode, tests for cover and sensor types

homeassistant/components/homekit/const.py

@@ -0,0 +1,18 @@
+"""Constants used be the homekit component."""
+MANUFACTURER = 'HomeAssistant'
+
+# Service: AccessoryInfomation
+SERVICES_ACCESSORY_INFO = 'AccessoryInformation'
+CHAR_MODEL = 'Model'
+CHAR_MANUFACTURER = 'Manufacturer'
+CHAR_SERIAL_NUMBER = 'SerialNumber'
+
+# Service: TemperatureSensor
+SERVICES_TEMPERATURE_SENSOR = 'TemperatureSensor'
+CHAR_CURRENT_TEMPERATURE = 'CurrentTemperature'
+
+# Service: WindowCovering
+SERVICES_WINDOW_COVERING = 'WindowCovering'
+CHAR_CURRENT_POSITION = 'CurrentPosition'
+CHAR_TARGET_POSITION = 'TargetPosition'
+CHAR_POSITION_STATE = 'PositionState'