Add org.sigxcup.org.Feedback.Haptic interface

Add new interface to submit patterns similar to https://www.w3.org/TR/vibration/

See individual commits for details.

Example:

busctl call --user org.sigxcpu.Feedback /org/sigxcpu/Feedback org.sigxcpu.Feedback.Haptic Vibrate 'sau' org.foo.app 7 123 1000 500 1000 750 1000 1000

Closes: #80 (closed)