Battery voltage display and holeshot timing

[odddollar]

Added:

• Battery voltage display to configuration page. Based off code from Feature/fastestlap and show battery voltage #17
  
• Holeshot timing. Time taken between race start and first lap being initiated (known as "holeshot") is displayed on the race page, with corresponding voice callouts
• Clicking Stop Race now resets race internally, allowing for starting a new race with a new holeshot without clearing the display of previous laps/races
  

Also formatted all files with VSCode's alt+shift+f.