add curtain 3 BLE API support

Author: Minsheng

README.md

@@ -5,6 +5,7 @@
 - [Color Bulb BLE open API](/devicetypes/colorbulb.md)
 - [Contact Sensor BLE open API](/devicetypes/contactsensor.md)
 - [Curtain BLE open API](/devicetypes/curtain.md)
+- [Curtain 3 BLE open API](/devicetypes/curtain3.md)
 - [LED Strip Light BLE open API](/devicetypes/ledstriplight.md)
 - [Meter BLE open API](/devicetypes/meter.md)
 - [Motion Sensor BLE open API](/devicetypes/motionsensor.md)
@@ -14,11 +15,12 @@
 ## Device Types
 
 | Product         | Device Type |
-|-----------------|-------------|
+| --------------- | ----------- |
 | Bot             | H (0x48)    |
 | Meter           | T (0x54)    |
 | Humidifier      | e (0x65)    |
 | Curtain         | c (0x63)    |
+| Curtain 3       |             |
 | Motion Sensor   | s (0x73)    |
 | Contact Sensor  | d (0x64)    |
 | Color Bulb      | u (0x75)    |

devicetypes/curtain.md

@@ -201,7 +201,6 @@ The basic format of the RSP packet returned by the device to the terminal is as
         </tr>
     </tbody>
 </table>
-
 <img alt="5702_1" src="https://switchbot-open-api.s3.amazonaws.com/Curtain+BLE+open+api/5702_1.png"></a>
 
 ## 0x0F extended command