Is your feature request related to a problem? Please describe.

Even with API 4.7s new Bot.set_my_commands, setting commands will be tiresome

Describe the solution you'd like

• Add description attribute to CommandHandler
• Add Disptacher.set_commands(update=False, delete=False, add=True) that
  • gets the bots command from the registered CommandHandlers
  • Checks that they are valid for BotCommand and set_my_commands
  • gets current commands
  • sets new commands with options:
    • update: If False don't change a command if already set
    • delete: If True, delete commands that were set but currently don't have a corresponding handler
    • add: If False and currently commands are set, doesn't add new ones

Describe alternatives you've considered

Tiresome handwork

Additional context

Bot.set_my_commands is very new, so maybe wait till the next API update to make sure Telegram doesn't change the methods directly