timer: Add ringing and counter

[vkareh]

The timer app currently issues a short buzz once and then disappears. There is no trace left that the timer finished or how long ago. This change makes the motor start ringing and presents a timer counter. The motor will continue the ringing pattern for 10 seconds and the timer counter will finally reset after 60 seconds.

[github-actions[bot]]

Build size and comparison to main:

Section	Size	Difference
text	379156B	304B
data	948B	0B
bss	63488B	0B

[mark9064]

Works great, huge usability improvement for the timer. Been running this for a while and it makes me a more consistent cook for sure!

I think it would be nice if the alarm and timer had different vibration patterns, but vibration needs to be overhauled anyway so this is good to go for now IMO

[rnwgnr]

Tested this today while cooking and this is indeed a great usability improvement for the timer.

Until now i missed a lot of the alarms, the vibration is just too short. Great work.