more explanations are needed for matrix newbies

[strukturart]

in the kaios discord server, the question often arises how the login works, i would find it useful if you could explain that in the readme file.

• where to create a matrix account
• explain the parameters of the login form
• how to make qr code for login

PASS [homeserver] [homerserver url] [username] [password]

[farooqkz]

I've written what is pattern of QR code. Regarding the other stuff I think it is a good idea to add them to the client. But definitly not for 0.0.0