Add Sonos "fade to volume" instead of "set volume"

[TedTolboom]

@Robbert Please check this example:

Transitions — Flexible time transitions

Thanks for your work @robertklep Sharing my Sonos Fade-in / Fade-out flows, based on the transitions app. 1.Trigger flow: [03] Flow being triggered and based on the volume level will trigger either the fade-in or fade-out flow 2.Fade in flow: [32] Start fade-in transition, with input: 0-0.1, 30s, 3s; volume level from 0 to 10% (0-0.1), in 30 seconds, 3 seconds per step 3.Fade out flow: [55] create a Better Logic variable (Sonos-Fade-out) to determine the transition duration based…