Add User-Agent customization feature

[O0FF0O]

I would like to request a feature that would allow users to customize the User-Agent header sent with requests made by the bot. Currently, the bot uses its own User-Agent header, which might not match the one used by the user's browser.

It would be great if users could supply their own User-Agent string, so that they can match the one used by their browser.

Could you please consider adding this feature to the bot? Thank you for your attention to this matter.