Add Usb Serial otg feature (#1055)

* Update esp3d_version.h
* Fix GCode client is not processed
* Update lua engine to 1.0.3
* Fix HOOKS and Init script conflicting at boot
* Add a queue for multiple scripts (max 5)
* Fix compilation failed on SERIAL_MKS on ESP32
* Explain better sanity check on SERIAL_MKS and DISPLAY
* Implement USB Serial OTG

lua_script_examples/push_button/detectpush.lua

@@ -0,0 +1,48 @@
+--[[
+    Detect push button
+
+    This example detects a push button connected to pin 4 and sends the command
+    to the printer screen when the button is pressed.
+
+    The push button is connected to pin 4 and the LOW value is when the button
+    is pressed.
+
+    Put this script in the ESP3D flash file system and call it from the init script in 
+    configuration.h.
+    #define ESP_AUTOSTART_SCRIPT "[ESP300]/FS/detectpush.lua"
+
+    You can also start it manually from the serial monitor by typing:
+    [ESP300]/FS/detectpush.lua
+    
+    Be sure to have the following line comment out in the configure.h:
+    #define ESP_LUA_INTERPRETER_FEATURE
+    ]]--
+
+-- Setup
+-- pin 0 is connected to the push button
+local pin = 0
+-- LOW is the value when the button is pressed
+local trigger_value = LOW
+-- send ESP3D command to display current IP address to the printer screen
+local command = "[ESP212]IP:%ESP_IP%\n"
+-- variable to read the pin value
+local pinval
+local lastpush = millis()
+-- define the pin mode
+pinMode(pin, INPUT_PULLUP)
+-- Main loop
+while (true) do
+    -- read the pin value
+    pinval = digitalRead(pin)
+    -- if the pin value is `trigger_value` then send the command
+    if (pinval == trigger_value) then
+        -- do not overflow the system so only send command if at least 1 second elapsed since last one
+        if ((millis()-lastpush) > 1000) then
+            lastpush = millis()
+            -- send the command to the esp3d
+            print(command)
+        end
+    end
+    -- yield to other tasks
+    yield()
+end