Simple functions for printing a line normal, large or centered
using format string directly instead of having to use both
snprintf first and then display function all the time
This makes the code more readable and compact
Applied this optimization where applicable in manu.cpp and display.cpp
- move speedsensor files from motorctl pcb to common
- single pcb create and configure global speedsensor objects
- display: create fast slow veryslow loop
- clear display every 30s
- show speed in rpm and km/h
NOTE: speedsensor needs fix, direction unreliable
slightly rework hacked display test
- new code structure
- split code in several functions
- add task for display instead of running it in main()
- functions to convert voltage to battery percent charged
- show percentage and voltage on display
