Links to more specific documentation and how to use different functions

[koopee]

As an example use following:

developers.home-assistant/docs/integration_listen_events.md

Line 48 in cb8bec6

| `async_track_point_in_time` | Add a listener that fires once after a specific point in time

So, if I would like to use this async_track_point_in_time, where do I find the parameters I'm supposed to add as input? How is this specific time defined for the function?

The only example in the beginning shows a simple use case, but does not define parameter types, which I think are equally as important to know how the function is supposed to be working. If the code is the documentation, perhaps links to the code should be added.

developers.home-assistant/docs/integration_listen_events.md

Lines 15 to 18 in cb8bec6

	```python3
	unsub = async_track_state_change_event(hass, entity_ids, state_automation_listener)
	unsub()
	```