command filter now can be sets with BotCommand object

[bomzheg]

Description

it will be usefull for bots using SetMyCommands api call.
Example:

ABOUT_CMD = BotCommand("about", "few info about bot, its creater etc")
...
@dp.message_handler(commands=ABOUT_CMD)
async def about_cmd_handler(m: Message):
    ...

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Test A
• Test B

Test Configuration:

• Operating System: Windows 10
• Python version: 3.8.9

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes.
  Few tests are not pass. Probably problem is in windows ( https://t.me/aiogram_ru/1176021 )

[evgfilim1]

See @Lamroy95's comment

[evgfilim1]

@bomzheg have you tested this directly? Can you provide a code which you run to test?

[evgfilim1]

LGTM, thanks for your effort.