Allow for linking of more than 7 remotes

[schnidrig]

Describe you new feature you'd like

Hello

According to https://service.somfy.com/downloads/ch_v5/solirismodulis_slim_receiver_de-geschl.pdf
at least some Somfy motors can be paired with up to 12 remotes.

ESPSomfy only allows for 7 linked remotes.

Would it be possible to increase this limit? I use remotes for scenes (all shutters, all shutters facing east/south/west) all shutters on a floor etc). Therefore 7 linked remotes is way too little.

Best Regards
Christian