Add documentation for subscribe decorator

[spontanurlaub]

Hello,

I really like your library, but I really missed the ability for topic specific handlers. I could only find that this feature was already implemented by digging into the source code. It is only used in the examples at a single point, but never mentioned in the readme or documentation.

Therefore I added documentation for the subscribe decorator to the readme and website. Hopefully this helps other users to find this feature more quickly.

Thanks for your work,

Jannik

[sabuhish]

Hello Hello,

Thank you so much for your nice words, I am happy that you liked the library and it is helpful for your case :)

Yes unfortuntely we have missed that part. This will definitely help, indeed thanks for your thoughts and help!