TODO:
- Scheduling next HPT event
- Carefully handling overflows
- Low level timer stuff

…or watch_hpt.c

Still some questions left in the code, and I had to disable the stock stopwatch and dual timer faces. Once I am sure this works properly, I'll update those faces to use it.

- Removed some debugging cruft and commented out code
- HPT requests are stored using a byte array instead of a single variable (allows for more than 64 HPT requests)
- Added "fast" mode to counter reads that skips the synchronization step
- Fixes and improvements to HPT timing faces.

Also refactors movement.c to use HPT buzzing for alarms, signals, and other short beeps.

Adds another feature to buzzer sequences: skip aheads. (Not used by anything yet, but repeater faces might need it.

Also enables TCC run in standby always. TCC is enabled on-demand anyway. Might as well let it run in standby.

Eventually, I would like to remove `watch_buzzer_play_note` because it uses delay_ms, but a lot of faces use it right now and they can be refactored later.