add default None for get_my_commands parameters scope and language_code sync\async, add examples for bot.set_my_commands

examples/set_command_example.py

@@ -0,0 +1,29 @@
+#!/usr/bin/python
+
+# This is a set_my_commands example.
+# Press on [/] button in telegram client.
+# Important, to update the command menu, be sure to exit the chat with the bot and enter to chat again
+# Important, command for chat_id and for group have a higher priority than for all
+
+import os
+import telebot
+
+
+API_TOKEN = '<api_token>'
+bot = telebot.TeleBot(API_TOKEN)
+
+# use in for delete with the necessary scope and language_code if necessary
+bot.delete_my_commands(scope=None, language_code=None)
+
+bot.set_my_commands(
+    commands=[
+        telebot.types.BotCommand("command1", "command1 description"),
+        telebot.types.BotCommand("command2", "command2 description")
+    ],
+    # scope=telebot.types.BotCommandScopeChat(12345678)  # use for personal command for users
+    # scope=telebot.types.BotCommandScopeAllPrivateChats()  # use for all private chats
+)
+
+# check command
+cmd = bot.get_my_commands(scope=None, language_code=None)
+print([c.to_json() for c in cmd])