* Add unique ID to config entries
* Unload existing entries with same unique ID if flow with unique ID is
finished
* Remove unused exception
* Fix typing
* silence pylint
* Fix tests
* Add unique ID to Hue
* Address typing comment
* Tweaks to comments
* lint
* Refactoring data_entry_flow and config_entry_flow
Move SOURCE_* to config_entries
Change data_entry_flow.FlowManager.async_init() source param default
to None
Change this first step_id as source or init if source is None
_BaseFlowManagerView pass in SOURCE_USER as default source
* First step of data entry flow decided by _async_create_flow() now
* Lint
* Change helpers.config_entry_flow.DiscoveryFlowHandler default step
* Change FlowManager.async_init source param to context dict param