Add Tuya Binary Sensor docs (#662)

* Add docs for Tuya binary sensor

* Add tuya binary to index

* Add link to tuya component

* Fix label

* update image link

Co-authored-by: Guillermo Ruffino <glm.net@gmail.com>

components/binary_sensor/tuya.rst

@@ -0,0 +1,34 @@
+Tuya Binary Sensor
+==================
+
+.. seo::
+    :description: Instructions for setting up a Tuya device binary sensor.
+
+The ``tuya`` binary sensor platform creates a binary sensor from a
+tuya component and requires :doc:`/components/tuya` to be configured.
+
+You can create the binary sensor as follows:
+
+.. code-block:: yaml
+
+    # Create a binary sensor
+    binary_sensor:
+      - platform: "tuya"
+        name: "MyBinarySensor"
+        sensor_datapoint: 1
+
+Configuration variables:
+------------------------
+
+- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
+- **name** (**Required**, string): The name of the binary sensor.
+- **sensor_datapoint** (**Required**, int): The datapoint id number of the binary sensor.
+- All other options from :ref:`Binary Sensor <config-binary_sensor>`.
+
+See Also
+--------
+
+- :doc:`/components/tuya`
+- :doc:`/components/binary_sensor/index`
+- :apiref:`tuya/binary_sensor/tuya_binary_sensor.h`
+- :ghedit:`Edit`

index.rst

@@ -187,6 +187,7 @@ Binary Sensor Components
     PN532, components/binary_sensor/pn532, pn532.jpg
     RDM6300, components/binary_sensor/rdm6300, rdm6300.jpg
     TTP229, components/binary_sensor/ttp229, ttp229.jpg
+    Tuya Binary Sensor, components/binary_sensor/tuya, tuya.png
     Custom Binary Sensor, components/binary_sensor/custom, language-cpp.svg
 
 Output Components