PTS/SettingsPTS : Convert to/from LVGL color and Settings::Color, add functions to reduce code duplication.
Adapt SettingPineTimeStyle with the last Screen Interface
* PineTimeStyle
* Move GPL license header
* Add step count gauge - replaces heartrate in sidebar
* Enable 12/24h functionality
* Set step gauge outer to be white when step goal is reached
* Add font source file
* Move static needle_colors array to member variable
* Add documentation on generating a font
* Replace .ttf with Google version, add link to font page
Co-authored-by: JF002 <JF002@users.noreply.github.com>