Add support for lightstrips (KL430) (#74)

* Preliminary support for light strips

* Add color temperature range and cleanup, thanks to @darkoppressor

* Use lightstrip instead of {led,light}strip consistently everywhere
* The cli flag is now --lightstrip

* add apidocs

* Add fixture file for KL430

Signed-off-by: Kevin Wells <darkoppressor@gmail.com>

* Add discovery support, expose effect and length of the strip

* use set_light_state instead of transition_light_state

* Add tests for lightstrip

* add doctests

* Add KL430 to supported devices in README

Co-authored-by: Kevin Wells <darkoppressor@gmail.com>

kasa/tests/test_readme_examples.py

@@ -51,6 +51,15 @@ def test_dimmer_examples(mocker):
     assert not res["failed"]
 
 
+def test_lightstrip_examples(mocker):
+    """Test lightstrip examples."""
+    p = get_device_for_file("KL430(US)_1.0.json")
+    mocker.patch("kasa.smartlightstrip.SmartLightStrip", return_value=p)
+    mocker.patch("kasa.smartlightstrip.SmartLightStrip.update")
+    res = xdoctest.doctest_module("kasa.smartlightstrip", "all")
+    assert not res["failed"]
+
+
 @pytest.mark.skipif(
     sys.version_info < (3, 8), reason="3.7 handles asyncio.run differently"
 )