* Update registration schema to add os_name (required) and make app_name required
* Ensure that a provided app_component is valid and available
* Ensure that component DEPENDENCIES declares mobile_app
* Update homeassistant/helpers/config_validation.py
* Standardize error responses
* Dont generalize REGISTER_BAD_COMPONENT
* Fix tests after merge
* First webhook commands for getting and deleting single registrations
* Keep a list of deleted webhook IDs so we can 410 if the webhook receives traffic in the future
* Return a empty JSON object instead of None
* Split up mobile_app bits into individual files
* Add typing
* Sort keys
* Remove unused async_setup_entry
* New decorator method of registering webhooks
* Add tests for cloud hook forwarding and improve error handling for cloud hooks
* Initial implementation of platform specific logic
* Add get registrations by user ID websocket call, minor style fixes
* Stop using resp dictionary during registration
* Move mobile_app/ios.py to ios/mobile_app.py
* Log any errors encountered during webhook
* Improve update registration call
* Split up mobile_app tests to match split up component
* Fix tests
* Remove integration_map in favor of component name in registration
* Add a few helper functions for custom logic components to use
* Load the app_component platform at device registration or component setup time
* Remove extraneous function
* Use guard function for checking if component is in device
* Inline websocket schemas
* Rename ATTR_s used in storage to DATA_ prefix
* squash flake8 and pylint issues
* Remove ios.mobile_app platform
* Dont mark websocket_api as a dependency
* Return standard empty_okay_response with 400 if no JSON sent
* Ensure deleted webhook IDs are registered at launch
* Remove the creation of cloudhooks during handle_webhook
* Rename device to registration everywhere applicable
* Dont check if cloud is logged in, just check if cloud is in components
* Dont ever use cloudhook_id
* Remove component loading logic for a later PR
* Cast exception to string
* Remove unused functions
Paulus Schoutsen
Robbie Trencheny