feat(MyAGVPro): Add get_emergency_stop_state api (#169)

* add MyCobot 280 X5PI API

* add MyCobot 280 X5 PI doc

* Fix MyCobot 280 X5 Pi doc errors

* add MyCobot 280 X5 PI sokcet sever&client

* MyCobot 280 X5 PI server compatible with python2

* rename MyCobot280x5pi to MyCobot280RDKX5

* fix MyArmMControl bugs

* fix MyArmC bugs

* fix myArmM&C demo bug

* update M&C demo

* fix MyCobot280 rdkx5 bug

* fix MyArmM&C bugs

* fix bugs

* fix bug

* fix ThreeHand api bug

* Fixed the issue that Pro630 could not read data

* fix MyArmM bug

* MyArmM&C adds get_joints_coord interface

* fix Pro630 bug

* fix Pro630 bugs

* Fixed the pro630 socket communication bug

* Optimize MyCobot280 RDK X5 interface parameter error prompt

* Optimized the way MyAGV reads MCU data

* feat(myagvpro): add myagvpro api

* fix(ConveyorApi):Fix the problem that no data is returned

* feat(MyAGVPro): Add get_emergency_stop_state api

* refactor(MyAGVPro): rename get_emergency_stop_state to get_estop_state

---------

Co-authored-by: Mrkun5018 <76215701+Mrkun5018@users.noreply.github.com>

Author: K-Shuffler

docs/MyAGVPro_en.md

@@ -160,8 +160,8 @@
   - **position(int):**
   - **0: Left LED**
   - **1: Right LED**
-  - **brightness(int): 0 - 255**
   - **color(tuple(int, int, int)): RGB color**
+  - **brightness(int): 0 - 255(default 255)**
 - **Return value:**
   - **int: 1: Success, 0: Failed**
 
@@ -175,7 +175,7 @@
 #### get_pin_input(pin):
 - **function:** Get the input IO
 - **parameter:**
-  - **pin(int): 1, 2, 3, 4, 5, 6, 7, 8, 254**
+  - **pin(int): 1 - 6**
 - **Return value:**
   - **int: 0: Low, 1: High, -1: There is no such pin**
 
@@ -187,6 +187,11 @@
 - **Return value:**
   - **int: 1: Success, 0: Failed**
 
+#### get_estop_state()
+- **function:** Get the emergency stop state
+- **Return value:**
+  - **int: 0: Release, 1: Press**
+
 ### 5. WiFi & Bluetooth
 
 #### get_wifi_ip_port():