Review haptic support

[dcapslock]

New issue to track haptics and changes over time

Refer #121 for more detail.

[dcapslock]

Also to note #760. Looks like when button-card stopped using custom-card helpers that custom haptic support was lost, and only the default Home Assistant haptic now remain, i.e. haptic: is now ignored. Need to check if we can use forwardHaptic and if that collides with HA defaults.