[PACKAGE/BOARD] Add handle usb-hid gadget (#55)

* Add handle usb-hid gadget (Tunr your handheld into usb gamepad for PC)

* Add special keys handling

* add Manual for USB-HID app

* use st terminal to execute script

---------

Co-authored-by: Apaczer <94932128+Apaczer@users.noreply.github.com>

board/miyoo/main/apps/usb-hid/usb-hid.py

@@ -0,0 +1,68 @@
+import sys
+import keyboard
+
+## usb hid codes: https://www.usb.org/sites/default/files/documents/hut1_12v2.pdf 
+hidCodeDict = {
+103:82, #up
+108:81, #down
+105:80, #left
+106:79, #right
+29:224, #b mapped to l_ctrl
+56:44, #a mapped to space
+57:225, #y mapped to l_shift
+42:27, #x mapped to x
+1:42, #select mapped to backspace
+28:40, #start mapped to enter
+15:226, #lpad1 mapped to l_alt
+14:43, #rpad1 mapped to tab
+104:75, #lpad2 mapped to pg_up
+109:78, #rpad2 mapped to pg_down
+97:0, #reset not mapped, used to quit
+}
+
+specialCodeDict = {
+224:1,
+225:2,
+226:4,
+227:8,
+228:16,
+229:32,
+230:64,
+231:128,
+}
+
+NULL_CHAR = chr(0)
+SPECIAL_KEY_CODES=[224,225,226,227,228,229,230,231]
+def write_report(report):
+    with open('/dev/hidg0', 'rb+') as fd:
+        fd.write(report.encode())
+
+def translate(code, dictonary):
+    if code in dictonary:
+        return dictonary[code]
+    return 0
+
+def write_pressed_keys(e):
+    print('\r', end='')
+    all_keys=[translate(code,hidCodeDict) for code in keyboard._pressed_events]
+    if not len(all_keys):
+        write_report(NULL_CHAR*8)
+        return
+        
+    special_keys=0
+    for s_key in SPECIAL_KEY_CODES:
+        if s_key in all_keys:
+            all_keys.remove(s_key)
+            special_keys += translate(s_key,specialCodeDict)
+  
+    if not len(all_keys):
+        write_report(chr(special_keys)+NULL_CHAR*7)
+        return
+
+    keys =''.join(chr(key) for key in all_keys)            
+    write_report(chr(special_keys)+NULL_CHAR+keys+NULL_CHAR*5)
+    
+    
+print("Press RESET button to quit")
+keyboard.hook(write_pressed_keys)
+keyboard.wait(97)