Philips Hue Tap Dial support for Feller EdizioDuo

I added some modifications to the original design by romainrosay:

• mirrored holes for magnets → leads to stronger hold, at least for my holder
• reduced overall height including a very thin distance between the magnets and the switch → even stronger hold
• rounded edges
• added printed holder (no Feller blind cover required), but requires M3 threaded inserts