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/smartdevice.py

@@ -32,6 +32,7 @@ class DeviceType(Enum):
     Bulb = 2
     Strip = 3
     Dimmer = 4
+    LightStrip = 5
     Unknown = -1
 
 
@@ -702,6 +703,11 @@ class SmartDevice:
         """Return True if the device is a bulb."""
         return self._device_type == DeviceType.Bulb
 
+    @property
+    def is_light_strip(self) -> bool:
+        """Return True if the device is a led strip."""
+        return self._device_type == DeviceType.LightStrip
+
     @property
     def is_plug(self) -> bool:
         """Return True if the device is a plug."""