Pupil-labs-realtime-api

- Fix documentation
- Revert: Remove :py:func:`pupil_labs.realtime_api.simple.discover_one_device`
- Revert: Add ``pupil_labs.realtime_api.simple.Network``

- Apply pre-commit fixes

- Split :py:mod:`pupil_labs.realtime_api.simple` into multiple files
- Remove ``pupil_labs.realtime_api.discovery.discover_one_device``
- Remove ``pupil_labs.realtime_api.simple.discover_one_device``
- Add ``pupil_labs.realtime_api.simple.Network``
- Add :py:class:`pupil_labs.realtime_api.discovery.Network`

- Add :py:exc:`pupil_labs.realtime_api.models.UnknownComponentError` and let
:py:func:`pupil_labs.realtime_api.models.parse_component` raise it when a component
could not be parsed/mapped
- Drop unknown components in :py:meth:`pupil_labs.realtime_api.models.Status.from_dict`
and :py:func:`pupil_labs.realtime_api.device.Device.status_updates`, and warn about it

- Add :py:class:`pupil_labs.realtime_api.models.NetworkDevice`
- Create a new HTTP client session if necessary on :py:class:`pupil_labs.realtime_api.device.Device`'s ``__aenter__`` method

- Remove ``pupil_labs.realtime_api.simple.Device.recording_recent_action`` and ``pupil_labs.realtime_api.simple.Device.recording_duration_seconds``
- Fix Python 3.7 incompatiblity due to using the ``name`` argument in :py:func:`asyncio.create_task` (added in Python 3.8)