[feature requerst] change welcome message

[gmankab]

Checklist

• [X] I believe the idea is awesome and would benefit the framework
• [X] I have searched in the issue tracker for similar requests, including closed ones

Description

I think it's important to add the ability to change the welcome message from welcome to pyrogram to made with pyrogram, or maybe disable it

if you develop an app using pyrogram, the user may think that pyrogram is the name of the app, although pyrogram is the library on which the application is written

[MrBotDeveloper]

Which welcome message you are talking about ?

[nin0-dev]

This one. @MrBotDeveloper